21228290

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{1031}}^1$

素因数の和:1138

約数の個数: 32

約数和(自身を含む): 40124160

約数和(自身を除く): 18895870

約数列:

[1, 2, 5, 10, 29, 58, 71, 142, 145, 290, 355, 710, 1031, 2059, 2062, 4118, 5155, 10295, 10310, 20590, 29899, 59798, 73201, 146402, 149495, 298990, 366005, 732010, 2122829, 4245658, 10614145, 21228290]

約数ペア:

[(1, 21228290), (2, 10614145), (5, 4245658), (10, 2122829), (29, 732010), (58, 366005), (71, 298990), (142, 149495), (145, 146402), (290, 73201), (355, 59798), (710, 29899), (1031, 20590), (2059, 10310), (2062, 10295), (4118, 5155)]