20173935920

素因数分解:

$2^4\times 5^1\times {\mathrm{809}}^1\times {\mathrm{311711}}^1$

素因数の和:312533

約数の個数: 40

約数和(自身を含む): 46962529920

約数和(自身を除く): 26788594000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809, 1618, 3236, 4045, 6472, 8090, 12944, 16180, 32360, 64720, 311711, 623422, 1246844, 1558555, 2493688, 3117110, 4987376, 6234220, 12468440, 24936880, 252174199, 504348398, 1008696796, 1260870995, 2017393592, 2521741990, 4034787184, 5043483980, 10086967960, 20173935920]

約数ペア:

[(1, 20173935920), (2, 10086967960), (4, 5043483980), (5, 4034787184), (8, 2521741990), (10, 2017393592), (16, 1260870995), (20, 1008696796), (40, 504348398), (80, 252174199), (809, 24936880), (1618, 12468440), (3236, 6234220), (4045, 4987376), (6472, 3117110), (8090, 2493688), (12944, 1558555), (16180, 1246844), (32360, 623422), (64720, 311711)]