640415360

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:267

約数の個数: 192

約数和(自身を含む): 1720258560

約数和(自身を除く): 1079843200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 128, 130, 155, 160, 169, 191, 208, 248, 260, 310, 320, 338, 382, 403, 416, 496, 520, 620, 640, 676, 764, 806, 832, 845, 955, 992, 1040, 1240, 1352, 1528, 1612, 1664, 1690, 1910, 1984, 2015, 2080, 2480, 2483, 2704, 3056, 3224, 3380, 3820, 3968, 4030, 4160, 4960, 4966, 5239, 5408, 5921, 6112, 6448, 6760, 7640, 8060, 8320, 9920, 9932, 10478, 10816, 11842, 12224, 12415, 12896, 13520, 15280, 16120, 19840, 19864, 20956, 21632, 23684, 24448, 24830, 25792, 26195, 27040, 29605, 30560, 32240, 32279, 39728, 41912, 47368, 49660, 51584, 52390, 54080, 59210, 61120, 64480, 64558, 76973, 79456, 83824, 94736, 99320, 104780, 108160, 118420, 122240, 128960, 129116, 153946, 158912, 161395, 167648, 189472, 198640, 209560, 236840, 257920, 258232, 307892, 317824, 322790, 335296, 378944, 384865, 397280, 419120, 473680, 516464, 615784, 645580, 670592, 757888, 769730, 794560, 838240, 947360, 1000649, 1032928, 1231568, 1291160, 1539460, 1589120, 1676480, 1894720, 2001298, 2065856, 2463136, 2582320, 3078920, 3352960, 3789440, 4002596, 4131712, 4926272, 5003245, 5164640, 6157840, 8005192, 9852544, 10006490, 10329280, 12315680, 16010384, 20012980, 20658560, 24631360, 32020768, 40025960, 49262720, 64041536, 80051920, 128083072, 160103840, 320207680, 640415360]

約数ペア:

[(1, 640415360), (2, 320207680), (4, 160103840), (5, 128083072), (8, 80051920), (10, 64041536), (13, 49262720), (16, 40025960), (20, 32020768), (26, 24631360), (31, 20658560), (32, 20012980), (40, 16010384), (52, 12315680), (62, 10329280), (64, 10006490), (65, 9852544), (80, 8005192), (104, 6157840), (124, 5164640), (128, 5003245), (130, 4926272), (155, 4131712), (160, 4002596), (169, 3789440), (191, 3352960), (208, 3078920), (248, 2582320), (260, 2463136), (310, 2065856), (320, 2001298), (338, 1894720), (382, 1676480), (403, 1589120), (416, 1539460), (496, 1291160), (520, 1231568), (620, 1032928), (640, 1000649), (676, 947360), (764, 838240), (806, 794560), (832, 769730), (845, 757888), (955, 670592), (992, 645580), (1040, 615784), (1240, 516464), (1352, 473680), (1528, 419120), (1612, 397280), (1664, 384865), (1690, 378944), (1910, 335296), (1984, 322790), (2015, 317824), (2080, 307892), (2480, 258232), (2483, 257920), (2704, 236840), (3056, 209560), (3224, 198640), (3380, 189472), (3820, 167648), (3968, 161395), (4030, 158912), (4160, 153946), (4960, 129116), (4966, 128960), (5239, 122240), (5408, 118420), (5921, 108160), (6112, 104780), (6448, 99320), (6760, 94736), (7640, 83824), (8060, 79456), (8320, 76973), (9920, 64558), (9932, 64480), (10478, 61120), (10816, 59210), (11842, 54080), (12224, 52390), (12415, 51584), (12896, 49660), (13520, 47368), (15280, 41912), (16120, 39728), (19840, 32279), (19864, 32240), (20956, 30560), (21632, 29605), (23684, 27040), (24448, 26195), (24830, 25792)]