20853832840

素因数分解:

$2^3\times 5^1\times {\mathrm{1291}}^1\times {\mathrm{403831}}^1$

素因数の和:405133

約数の個数: 32

約数和(自身を含む): 46957584960

約数和(自身を除く): 26103752120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1291, 2582, 5164, 6455, 10328, 12910, 25820, 51640, 403831, 807662, 1615324, 2019155, 3230648, 4038310, 8076620, 16153240, 521345821, 1042691642, 2085383284, 2606729105, 4170766568, 5213458210, 10426916420, 20853832840]

約数ペア:

[(1, 20853832840), (2, 10426916420), (4, 5213458210), (5, 4170766568), (8, 2606729105), (10, 2085383284), (20, 1042691642), (40, 521345821), (1291, 16153240), (2582, 8076620), (5164, 4038310), (6455, 3230648), (10328, 2019155), (12910, 1615324), (25820, 807662), (51640, 403831)]