18377840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{431}}^1$

素因数の和:498

約数の個数: 80

約数和(自身を含む): 47246976

約数和(自身を除く): 28869136

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, 431, 520, 533, 656, 820, 862, 1040, 1066, 1640, 1724, 2132, 2155, 2665, 3280, 3448, 4264, 4310, 5330, 5603, 6896, 8528, 8620, 10660, 11206, 17240, 17671, 21320, 22412, 28015, 34480, 35342, 42640, 44824, 56030, 70684, 88355, 89648, 112060, 141368, 176710, 224120, 229723, 282736, 353420, 448240, 459446, 706840, 918892, 1148615, 1413680, 1837784, 2297230, 3675568, 4594460, 9188920, 18377840]

約数ペア:

[(1, 18377840), (2, 9188920), (4, 4594460), (5, 3675568), (8, 2297230), (10, 1837784), (13, 1413680), (16, 1148615), (20, 918892), (26, 706840), (40, 459446), (41, 448240), (52, 353420), (65, 282736), (80, 229723), (82, 224120), (104, 176710), (130, 141368), (164, 112060), (205, 89648), (208, 88355), (260, 70684), (328, 56030), (410, 44824), (431, 42640), (520, 35342), (533, 34480), (656, 28015), (820, 22412), (862, 21320), (1040, 17671), (1066, 17240), (1640, 11206), (1724, 10660), (2132, 8620), (2155, 8528), (2665, 6896), (3280, 5603), (3448, 5330), (4264, 4310)]