20672360

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:362

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28316440

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 232, 251, 284, 290, 355, 502, 568, 580, 710, 1004, 1160, 1255, 1420, 2008, 2059, 2510, 2840, 4118, 5020, 7279, 8236, 10040, 10295, 14558, 16472, 17821, 20590, 29116, 35642, 36395, 41180, 58232, 71284, 72790, 82360, 89105, 142568, 145580, 178210, 291160, 356420, 516809, 712840, 1033618, 2067236, 2584045, 4134472, 5168090, 10336180, 20672360]

約数ペア:

[(1, 20672360), (2, 10336180), (4, 5168090), (5, 4134472), (8, 2584045), (10, 2067236), (20, 1033618), (29, 712840), (40, 516809), (58, 356420), (71, 291160), (116, 178210), (142, 145580), (145, 142568), (232, 89105), (251, 82360), (284, 72790), (290, 71284), (355, 58232), (502, 41180), (568, 36395), (580, 35642), (710, 29116), (1004, 20590), (1160, 17821), (1255, 16472), (1420, 14558), (2008, 10295), (2059, 10040), (2510, 8236), (2840, 7279), (4118, 5020)]