20504980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{211}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 44662464

約数和(自身を除く): 24157484

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 113, 172, 211, 215, 226, 422, 430, 452, 565, 844, 860, 1055, 1130, 2110, 2260, 4220, 4859, 9073, 9718, 18146, 19436, 23843, 24295, 36292, 45365, 47686, 48590, 90730, 95372, 97180, 119215, 181460, 238430, 476860, 1025249, 2050498, 4100996, 5126245, 10252490, 20504980]

約数ペア:

[(1, 20504980), (2, 10252490), (4, 5126245), (5, 4100996), (10, 2050498), (20, 1025249), (43, 476860), (86, 238430), (113, 181460), (172, 119215), (211, 97180), (215, 95372), (226, 90730), (422, 48590), (430, 47686), (452, 45365), (565, 36292), (844, 24295), (860, 23843), (1055, 19436), (1130, 18146), (2110, 9718), (2260, 9073), (4220, 4859)]