20541140

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1\times {\mathrm{149}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 44528400

約数和(自身を除く): 23987260

約数列:

[1, 2, 4, 5, 10, 20, 61, 113, 122, 149, 226, 244, 298, 305, 452, 565, 596, 610, 745, 1130, 1220, 1490, 2260, 2980, 6893, 9089, 13786, 16837, 18178, 27572, 33674, 34465, 36356, 45445, 67348, 68930, 84185, 90890, 137860, 168370, 181780, 336740, 1027057, 2054114, 4108228, 5135285, 10270570, 20541140]

約数ペア:

[(1, 20541140), (2, 10270570), (4, 5135285), (5, 4108228), (10, 2054114), (20, 1027057), (61, 336740), (113, 181780), (122, 168370), (149, 137860), (226, 90890), (244, 84185), (298, 68930), (305, 67348), (452, 45445), (565, 36356), (596, 34465), (610, 33674), (745, 27572), (1130, 18178), (1220, 16837), (1490, 13786), (2260, 9089), (2980, 6893)]