21000908025

素因数分解:

$3^2\times 5^2\times {\mathrm{131}}^1\times {\mathrm{712499}}^1$

素因数の和:712646

約数の個数: 36

約数和(自身を含む): 37902150000

約数和(自身を除く): 16901241975

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 131, 225, 393, 655, 1179, 1965, 3275, 5895, 9825, 29475, 712499, 2137497, 3562495, 6412491, 10687485, 17812475, 32062455, 53437425, 93337369, 160312275, 280012107, 466686845, 840036321, 1400060535, 2333434225, 4200181605, 7000302675, 21000908025]

約数ペア:

[(1, 21000908025), (3, 7000302675), (5, 4200181605), (9, 2333434225), (15, 1400060535), (25, 840036321), (45, 466686845), (75, 280012107), (131, 160312275), (225, 93337369), (393, 53437425), (655, 32062455), (1179, 17812475), (1965, 10687485), (3275, 6412491), (5895, 3562495), (9825, 2137497), (29475, 712499)]