18405940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4241}}^1$

素因数の和:4288

約数の個数: 48

約数和(自身を含む): 45609984

約数和(自身を除く): 27204044

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4241, 4340, 8482, 16964, 21205, 29687, 42410, 59374, 84820, 118748, 131471, 148435, 262942, 296870, 525884, 593740, 657355, 920297, 1314710, 1840594, 2629420, 3681188, 4601485, 9202970, 18405940]

約数ペア:

[(1, 18405940), (2, 9202970), (4, 4601485), (5, 3681188), (7, 2629420), (10, 1840594), (14, 1314710), (20, 920297), (28, 657355), (31, 593740), (35, 525884), (62, 296870), (70, 262942), (124, 148435), (140, 131471), (155, 118748), (217, 84820), (310, 59374), (434, 42410), (620, 29687), (868, 21205), (1085, 16964), (2170, 8482), (4241, 4340)]