21578080

素因数分解:

$2^5\times 5^1\times {\mathrm{157}}^1\times {\mathrm{859}}^1$

素因数の和:1031

約数の個数: 48

約数和(自身を含む): 51362640

約数和(自身を除く): 29784560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 157, 160, 314, 628, 785, 859, 1256, 1570, 1718, 2512, 3140, 3436, 4295, 5024, 6280, 6872, 8590, 12560, 13744, 17180, 25120, 27488, 34360, 68720, 134863, 137440, 269726, 539452, 674315, 1078904, 1348630, 2157808, 2697260, 4315616, 5394520, 10789040, 21578080]

約数ペア:

[(1, 21578080), (2, 10789040), (4, 5394520), (5, 4315616), (8, 2697260), (10, 2157808), (16, 1348630), (20, 1078904), (32, 674315), (40, 539452), (80, 269726), (157, 137440), (160, 134863), (314, 68720), (628, 34360), (785, 27488), (859, 25120), (1256, 17180), (1570, 13744), (1718, 12560), (2512, 8590), (3140, 6872), (3436, 6280), (4295, 5024)]