20856560

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4919}}^1$

素因数の和:4985

約数の個数: 40

約数和(自身を含む): 49416480

約数和(自身を除く): 28559920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4919, 9838, 19676, 24595, 39352, 49190, 78704, 98380, 196760, 260707, 393520, 521414, 1042828, 1303535, 2085656, 2607070, 4171312, 5214140, 10428280, 20856560]

約数ペア:

[(1, 20856560), (2, 10428280), (4, 5214140), (5, 4171312), (8, 2607070), (10, 2085656), (16, 1303535), (20, 1042828), (40, 521414), (53, 393520), (80, 260707), (106, 196760), (212, 98380), (265, 78704), (424, 49190), (530, 39352), (848, 24595), (1060, 19676), (2120, 9838), (4240, 4919)]