20067580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{977}}^1$

素因数の和:1078

約数の個数: 48

約数和(自身を含む): 46005120

約数和(自身を除く): 25937540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 977, 1027, 1580, 1954, 2054, 3908, 4108, 4885, 5135, 9770, 10270, 12701, 19540, 20540, 25402, 50804, 63505, 77183, 127010, 154366, 254020, 308732, 385915, 771830, 1003379, 1543660, 2006758, 4013516, 5016895, 10033790, 20067580]

約数ペア:

[(1, 20067580), (2, 10033790), (4, 5016895), (5, 4013516), (10, 2006758), (13, 1543660), (20, 1003379), (26, 771830), (52, 385915), (65, 308732), (79, 254020), (130, 154366), (158, 127010), (260, 77183), (316, 63505), (395, 50804), (790, 25402), (977, 20540), (1027, 19540), (1580, 12701), (1954, 10270), (2054, 9770), (3908, 5135), (4108, 4885)]