28867280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{677}}^1$

素因数の和:744

約数の個数: 80

約数和(自身を含む): 74151504

約数和(自身を除く): 45284224

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 520, 533, 656, 677, 820, 1040, 1066, 1354, 1640, 2132, 2665, 2708, 3280, 3385, 4264, 5330, 5416, 6770, 8528, 8801, 10660, 10832, 13540, 17602, 21320, 27080, 27757, 35204, 42640, 44005, 54160, 55514, 70408, 88010, 111028, 138785, 140816, 176020, 222056, 277570, 352040, 360841, 444112, 555140, 704080, 721682, 1110280, 1443364, 1804205, 2220560, 2886728, 3608410, 5773456, 7216820, 14433640, 28867280]

約数ペア:

[(1, 28867280), (2, 14433640), (4, 7216820), (5, 5773456), (8, 3608410), (10, 2886728), (13, 2220560), (16, 1804205), (20, 1443364), (26, 1110280), (40, 721682), (41, 704080), (52, 555140), (65, 444112), (80, 360841), (82, 352040), (104, 277570), (130, 222056), (164, 176020), (205, 140816), (208, 138785), (260, 111028), (328, 88010), (410, 70408), (520, 55514), (533, 54160), (656, 44005), (677, 42640), (820, 35204), (1040, 27757), (1066, 27080), (1354, 21320), (1640, 17602), (2132, 13540), (2665, 10832), (2708, 10660), (3280, 8801), (3385, 8528), (4264, 6770), (5330, 5416)]