21018889460

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{1043639}}^1$

素因数の和:1043720

約数の個数: 48

約数和(自身を含む): 47339510400

約数和(自身を除く): 26320620940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 53, 76, 95, 106, 190, 212, 265, 380, 530, 1007, 1060, 2014, 4028, 5035, 10070, 20140, 1043639, 2087278, 4174556, 5218195, 10436390, 19829141, 20872780, 39658282, 55312867, 79316564, 99145705, 110625734, 198291410, 221251468, 276564335, 396582820, 553128670, 1050944473, 1106257340, 2101888946, 4203777892, 5254722365, 10509444730, 21018889460]

約数ペア:

[(1, 21018889460), (2, 10509444730), (4, 5254722365), (5, 4203777892), (10, 2101888946), (19, 1106257340), (20, 1050944473), (38, 553128670), (53, 396582820), (76, 276564335), (95, 221251468), (106, 198291410), (190, 110625734), (212, 99145705), (265, 79316564), (380, 55312867), (530, 39658282), (1007, 20872780), (1060, 19829141), (2014, 10436390), (4028, 5218195), (5035, 4174556), (10070, 2087278), (20140, 1043639)]