20375680

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:142

約数の個数: 128

約数和(自身を含む): 54835200

約数和(自身を除く): 34459520

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, 260, 310, 316, 320, 395, 403, 416, 496, 520, 620, 632, 640, 790, 806, 832, 992, 1027, 1040, 1240, 1264, 1580, 1612, 1664, 1984, 2015, 2054, 2080, 2449, 2480, 2528, 3160, 3224, 3968, 4030, 4108, 4160, 4898, 4960, 5056, 5135, 6320, 6448, 8060, 8216, 8320, 9796, 9920, 10112, 10270, 12245, 12640, 12896, 16120, 16432, 19592, 19840, 20540, 24490, 25280, 25792, 31837, 32240, 32864, 39184, 41080, 48980, 50560, 51584, 63674, 64480, 65728, 78368, 82160, 97960, 127348, 128960, 131456, 156736, 159185, 164320, 195920, 254696, 257920, 313472, 318370, 328640, 391840, 509392, 636740, 657280, 783680, 1018784, 1273480, 1567360, 2037568, 2546960, 4075136, 5093920, 10187840, 20375680]

約数ペア:

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