855920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{823}}^1$

素因数の和:849

約数の個数: 40

約数和(自身を含む): 2145696

約数和(自身を除く): 1289776

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 823, 1040, 1646, 3292, 4115, 6584, 8230, 10699, 13168, 16460, 21398, 32920, 42796, 53495, 65840, 85592, 106990, 171184, 213980, 427960, 855920]

約数ペア:

[(1, 855920), (2, 427960), (4, 213980), (5, 171184), (8, 106990), (10, 85592), (13, 65840), (16, 53495), (20, 42796), (26, 32920), (40, 21398), (52, 16460), (65, 13168), (80, 10699), (104, 8230), (130, 6584), (208, 4115), (260, 3292), (520, 1646), (823, 1040)]