20143780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{397}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 44130240

約数和(自身を除く): 23986460

約数列:

[1, 2, 4, 5, 10, 20, 43, 59, 86, 118, 172, 215, 236, 295, 397, 430, 590, 794, 860, 1180, 1588, 1985, 2537, 3970, 5074, 7940, 10148, 12685, 17071, 23423, 25370, 34142, 46846, 50740, 68284, 85355, 93692, 117115, 170710, 234230, 341420, 468460, 1007189, 2014378, 4028756, 5035945, 10071890, 20143780]

約数ペア:

[(1, 20143780), (2, 10071890), (4, 5035945), (5, 4028756), (10, 2014378), (20, 1007189), (43, 468460), (59, 341420), (86, 234230), (118, 170710), (172, 117115), (215, 93692), (236, 85355), (295, 68284), (397, 50740), (430, 46846), (590, 34142), (794, 25370), (860, 23423), (1180, 17071), (1588, 12685), (1985, 10148), (2537, 7940), (3970, 5074)]