209728640

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^3$

素因数の和:123

約数の個数: 128

約数和(自身を含む): 565194240

約数和(自身を除く): 355465600

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 32, 40, 44, 55, 62, 64, 80, 88, 110, 124, 128, 155, 160, 176, 220, 248, 310, 320, 341, 352, 440, 496, 620, 640, 682, 704, 880, 961, 992, 1240, 1364, 1408, 1705, 1760, 1922, 1984, 2480, 2728, 3410, 3520, 3844, 3968, 4805, 4960, 5456, 6820, 7040, 7688, 9610, 9920, 10571, 10912, 13640, 15376, 19220, 19840, 21142, 21824, 27280, 29791, 30752, 38440, 42284, 43648, 52855, 54560, 59582, 61504, 76880, 84568, 105710, 109120, 119164, 123008, 148955, 153760, 169136, 211420, 218240, 238328, 297910, 307520, 327701, 338272, 422840, 476656, 595820, 615040, 655402, 676544, 845680, 953312, 1191640, 1310804, 1353088, 1638505, 1691360, 1906624, 2383280, 2621608, 3277010, 3382720, 3813248, 4766560, 5243216, 6554020, 6765440, 9533120, 10486432, 13108040, 19066240, 20972864, 26216080, 41945728, 52432160, 104864320, 209728640]

約数ペア:

[(1, 209728640), (2, 104864320), (4, 52432160), (5, 41945728), (8, 26216080), (10, 20972864), (11, 19066240), (16, 13108040), (20, 10486432), (22, 9533120), (31, 6765440), (32, 6554020), (40, 5243216), (44, 4766560), (55, 3813248), (62, 3382720), (64, 3277010), (80, 2621608), (88, 2383280), (110, 1906624), (124, 1691360), (128, 1638505), (155, 1353088), (160, 1310804), (176, 1191640), (220, 953312), (248, 845680), (310, 676544), (320, 655402), (341, 615040), (352, 595820), (440, 476656), (496, 422840), (620, 338272), (640, 327701), (682, 307520), (704, 297910), (880, 238328), (961, 218240), (992, 211420), (1240, 169136), (1364, 153760), (1408, 148955), (1705, 123008), (1760, 119164), (1922, 109120), (1984, 105710), (2480, 84568), (2728, 76880), (3410, 61504), (3520, 59582), (3844, 54560), (3968, 52855), (4805, 43648), (4960, 42284), (5456, 38440), (6820, 30752), (7040, 29791), (7688, 27280), (9610, 21824), (9920, 21142), (10571, 19840), (10912, 19220), (13640, 15376)]