21453720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{178781}}^1$

素因数の和:178795

約数の個数: 32

約数和(自身を含む): 64361520

約数和(自身を除く): 42907800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 178781, 357562, 536343, 715124, 893905, 1072686, 1430248, 1787810, 2145372, 2681715, 3575620, 4290744, 5363430, 7151240, 10726860, 21453720]

約数ペア:

[(1, 21453720), (2, 10726860), (3, 7151240), (4, 5363430), (5, 4290744), (6, 3575620), (8, 2681715), (10, 2145372), (12, 1787810), (15, 1430248), (20, 1072686), (24, 893905), (30, 715124), (40, 536343), (60, 357562), (120, 178781)]