853840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{821}}^1$

素因数の和:847

約数の個数: 40

約数和(自身を含む): 2140488

約数和(自身を除く): 1286648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 821, 1040, 1642, 3284, 4105, 6568, 8210, 10673, 13136, 16420, 21346, 32840, 42692, 53365, 65680, 85384, 106730, 170768, 213460, 426920, 853840]

約数ペア:

[(1, 853840), (2, 426920), (4, 213460), (5, 170768), (8, 106730), (10, 85384), (13, 65680), (16, 53365), (20, 42692), (26, 32840), (40, 21346), (52, 16420), (65, 13136), (80, 10673), (104, 8210), (130, 6568), (208, 4105), (260, 3284), (520, 1642), (821, 1040)]