28509520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{347}}^1$

素因数の和:452

約数の個数: 80

約数和(自身を含む): 72495360

約数和(自身を除く): 43985840

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 79, 80, 104, 130, 158, 208, 260, 316, 347, 395, 520, 632, 694, 790, 1027, 1040, 1264, 1388, 1580, 1735, 2054, 2776, 3160, 3470, 4108, 4511, 5135, 5552, 6320, 6940, 8216, 9022, 10270, 13880, 16432, 18044, 20540, 22555, 27413, 27760, 36088, 41080, 45110, 54826, 72176, 82160, 90220, 109652, 137065, 180440, 219304, 274130, 356369, 360880, 438608, 548260, 712738, 1096520, 1425476, 1781845, 2193040, 2850952, 3563690, 5701904, 7127380, 14254760, 28509520]

約数ペア:

[(1, 28509520), (2, 14254760), (4, 7127380), (5, 5701904), (8, 3563690), (10, 2850952), (13, 2193040), (16, 1781845), (20, 1425476), (26, 1096520), (40, 712738), (52, 548260), (65, 438608), (79, 360880), (80, 356369), (104, 274130), (130, 219304), (158, 180440), (208, 137065), (260, 109652), (316, 90220), (347, 82160), (395, 72176), (520, 54826), (632, 45110), (694, 41080), (790, 36088), (1027, 27760), (1040, 27413), (1264, 22555), (1388, 20540), (1580, 18044), (1735, 16432), (2054, 13880), (2776, 10270), (3160, 9022), (3470, 8216), (4108, 6940), (4511, 6320), (5135, 5552)]