20158940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{211}}^1\times {\mathrm{281}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 45196704

約数和(自身を除く): 25037764

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 211, 281, 340, 422, 562, 844, 1055, 1124, 1405, 2110, 2810, 3587, 4220, 4777, 5620, 7174, 9554, 14348, 17935, 19108, 23885, 35870, 47770, 59291, 71740, 95540, 118582, 237164, 296455, 592910, 1007947, 1185820, 2015894, 4031788, 5039735, 10079470, 20158940]

約数ペア:

[(1, 20158940), (2, 10079470), (4, 5039735), (5, 4031788), (10, 2015894), (17, 1185820), (20, 1007947), (34, 592910), (68, 296455), (85, 237164), (170, 118582), (211, 95540), (281, 71740), (340, 59291), (422, 47770), (562, 35870), (844, 23885), (1055, 19108), (1124, 17935), (1405, 14348), (2110, 9554), (2810, 7174), (3587, 5620), (4220, 4777)]