398401840

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{44071}}^1$

素因数の和:44197

約数の個数: 40

約数和(自身を含む): 934502688

約数和(自身を除く): 536100848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 4520, 9040, 44071, 88142, 176284, 220355, 352568, 440710, 705136, 881420, 1762840, 3525680, 4980023, 9960046, 19920092, 24900115, 39840184, 49800230, 79680368, 99600460, 199200920, 398401840]

約数ペア:

[(1, 398401840), (2, 199200920), (4, 99600460), (5, 79680368), (8, 49800230), (10, 39840184), (16, 24900115), (20, 19920092), (40, 9960046), (80, 4980023), (113, 3525680), (226, 1762840), (452, 881420), (565, 705136), (904, 440710), (1130, 352568), (1808, 220355), (2260, 176284), (4520, 88142), (9040, 44071)]