20820560

素因数分解:

$2^4\times 5^1\times {\mathrm{317}}^1\times {\mathrm{821}}^1$

素因数の和:1151

約数の個数: 40

約数和(自身を含む): 48619656

約数和(自身を除く): 27799096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 317, 634, 821, 1268, 1585, 1642, 2536, 3170, 3284, 4105, 5072, 6340, 6568, 8210, 12680, 13136, 16420, 25360, 32840, 65680, 260257, 520514, 1041028, 1301285, 2082056, 2602570, 4164112, 5205140, 10410280, 20820560]

約数ペア:

[(1, 20820560), (2, 10410280), (4, 5205140), (5, 4164112), (8, 2602570), (10, 2082056), (16, 1301285), (20, 1041028), (40, 520514), (80, 260257), (317, 65680), (634, 32840), (821, 25360), (1268, 16420), (1585, 13136), (1642, 12680), (2536, 8210), (3170, 6568), (3284, 6340), (4105, 5072)]