123490820

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{151}}^1\times {\mathrm{397}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 264246528

約数和(自身を除く): 140755708

約数列:

[1, 2, 4, 5, 10, 20, 103, 151, 206, 302, 397, 412, 515, 604, 755, 794, 1030, 1510, 1588, 1985, 2060, 3020, 3970, 7940, 15553, 31106, 40891, 59947, 62212, 77765, 81782, 119894, 155530, 163564, 204455, 239788, 299735, 311060, 408910, 599470, 817820, 1198940, 6174541, 12349082, 24698164, 30872705, 61745410, 123490820]

約数ペア:

[(1, 123490820), (2, 61745410), (4, 30872705), (5, 24698164), (10, 12349082), (20, 6174541), (103, 1198940), (151, 817820), (206, 599470), (302, 408910), (397, 311060), (412, 299735), (515, 239788), (604, 204455), (755, 163564), (794, 155530), (1030, 119894), (1510, 81782), (1588, 77765), (1985, 62212), (2060, 59947), (3020, 40891), (3970, 31106), (7940, 15553)]