21229960

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12343}}^1$

素因数の和:12397

約数の個数: 32

約数和(自身を含む): 48882240

約数和(自身を除く): 27652280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12343, 24686, 49372, 61715, 98744, 123430, 246860, 493720, 530749, 1061498, 2122996, 2653745, 4245992, 5307490, 10614980, 21229960]

約数ペア:

[(1, 21229960), (2, 10614980), (4, 5307490), (5, 4245992), (8, 2653745), (10, 2122996), (20, 1061498), (40, 530749), (43, 493720), (86, 246860), (172, 123430), (215, 98744), (344, 61715), (430, 49372), (860, 24686), (1720, 12343)]