18561380

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{191}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 40449024

約数和(自身を除く): 21887644

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 113, 172, 191, 215, 226, 382, 430, 452, 565, 764, 860, 955, 1130, 1910, 2260, 3820, 4859, 8213, 9718, 16426, 19436, 21583, 24295, 32852, 41065, 43166, 48590, 82130, 86332, 97180, 107915, 164260, 215830, 431660, 928069, 1856138, 3712276, 4640345, 9280690, 18561380]

約数ペア:

[(1, 18561380), (2, 9280690), (4, 4640345), (5, 3712276), (10, 1856138), (20, 928069), (43, 431660), (86, 215830), (113, 164260), (172, 107915), (191, 97180), (215, 86332), (226, 82130), (382, 48590), (430, 43166), (452, 41065), (565, 32852), (764, 24295), (860, 21583), (955, 19436), (1130, 16426), (1910, 9718), (2260, 8213), (3820, 4859)]