18488920

素因数分解:

$2^3\times 5^1\times {\mathrm{563}}^1\times {\mathrm{821}}^1$

素因数の和:1395

約数の個数: 32

約数和(自身を含む): 41724720

約数和(自身を除く): 23235800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 563, 821, 1126, 1642, 2252, 2815, 3284, 4105, 4504, 5630, 6568, 8210, 11260, 16420, 22520, 32840, 462223, 924446, 1848892, 2311115, 3697784, 4622230, 9244460, 18488920]

約数ペア:

[(1, 18488920), (2, 9244460), (4, 4622230), (5, 3697784), (8, 2311115), (10, 1848892), (20, 924446), (40, 462223), (563, 32840), (821, 22520), (1126, 16420), (1642, 11260), (2252, 8210), (2815, 6568), (3284, 5630), (4105, 4504)]