20907680

素因数分解:

$2^5\times 5^1\times {\mathrm{149}}^1\times {\mathrm{877}}^1$

素因数の和:1041

約数の個数: 48

約数和(自身を含む): 49782600

約数和(自身を除く): 28874920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 149, 160, 298, 596, 745, 877, 1192, 1490, 1754, 2384, 2980, 3508, 4385, 4768, 5960, 7016, 8770, 11920, 14032, 17540, 23840, 28064, 35080, 70160, 130673, 140320, 261346, 522692, 653365, 1045384, 1306730, 2090768, 2613460, 4181536, 5226920, 10453840, 20907680]

約数ペア:

[(1, 20907680), (2, 10453840), (4, 5226920), (5, 4181536), (8, 2613460), (10, 2090768), (16, 1306730), (20, 1045384), (32, 653365), (40, 522692), (80, 261346), (149, 140320), (160, 130673), (298, 70160), (596, 35080), (745, 28064), (877, 23840), (1192, 17540), (1490, 14032), (1754, 11920), (2384, 8770), (2980, 7016), (3508, 5960), (4385, 4768)]