81502720

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 160

約数和(自身を含む): 219985920

約数和(自身を除く): 138483200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 79, 80, 104, 124, 128, 130, 155, 158, 160, 208, 248, 256, 260, 310, 316, 320, 395, 403, 416, 496, 512, 520, 620, 632, 640, 790, 806, 832, 992, 1027, 1040, 1240, 1264, 1280, 1580, 1612, 1664, 1984, 2015, 2054, 2080, 2449, 2480, 2528, 2560, 3160, 3224, 3328, 3968, 4030, 4108, 4160, 4898, 4960, 5056, 5135, 6320, 6448, 6656, 7936, 8060, 8216, 8320, 9796, 9920, 10112, 10270, 12245, 12640, 12896, 15872, 16120, 16432, 16640, 19592, 19840, 20224, 20540, 24490, 25280, 25792, 31837, 32240, 32864, 33280, 39184, 39680, 40448, 41080, 48980, 50560, 51584, 63674, 64480, 65728, 78368, 79360, 82160, 97960, 101120, 103168, 127348, 128960, 131456, 156736, 159185, 164320, 195920, 202240, 206336, 254696, 257920, 262912, 313472, 318370, 328640, 391840, 509392, 515840, 525824, 626944, 636740, 657280, 783680, 1018784, 1031680, 1253888, 1273480, 1314560, 1567360, 2037568, 2546960, 2629120, 3134720, 4075136, 5093920, 6269440, 8150272, 10187840, 16300544, 20375680, 40751360, 81502720]

約数ペア:

[(1, 81502720), (2, 40751360), (4, 20375680), (5, 16300544), (8, 10187840), (10, 8150272), (13, 6269440), (16, 5093920), (20, 4075136), (26, 3134720), (31, 2629120), (32, 2546960), (40, 2037568), (52, 1567360), (62, 1314560), (64, 1273480), (65, 1253888), (79, 1031680), (80, 1018784), (104, 783680), (124, 657280), (128, 636740), (130, 626944), (155, 525824), (158, 515840), (160, 509392), (208, 391840), (248, 328640), (256, 318370), (260, 313472), (310, 262912), (316, 257920), (320, 254696), (395, 206336), (403, 202240), (416, 195920), (496, 164320), (512, 159185), (520, 156736), (620, 131456), (632, 128960), (640, 127348), (790, 103168), (806, 101120), (832, 97960), (992, 82160), (1027, 79360), (1040, 78368), (1240, 65728), (1264, 64480), (1280, 63674), (1580, 51584), (1612, 50560), (1664, 48980), (1984, 41080), (2015, 40448), (2054, 39680), (2080, 39184), (2449, 33280), (2480, 32864), (2528, 32240), (2560, 31837), (3160, 25792), (3224, 25280), (3328, 24490), (3968, 20540), (4030, 20224), (4108, 19840), (4160, 19592), (4898, 16640), (4960, 16432), (5056, 16120), (5135, 15872), (6320, 12896), (6448, 12640), (6656, 12245), (7936, 10270), (8060, 10112), (8216, 9920), (8320, 9796)]