21192885

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3541}}^1$

素因数の和:3578

約数の個数: 48

約数和(自身を含む): 44204160

約数和(自身を除く): 23011275

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 57, 63, 95, 105, 133, 171, 285, 315, 399, 665, 855, 1197, 1995, 3541, 5985, 10623, 17705, 24787, 31869, 53115, 67279, 74361, 123935, 159345, 201837, 223083, 336395, 371805, 470953, 605511, 1009185, 1115415, 1412859, 2354765, 3027555, 4238577, 7064295, 21192885]

約数ペア:

[(1, 21192885), (3, 7064295), (5, 4238577), (7, 3027555), (9, 2354765), (15, 1412859), (19, 1115415), (21, 1009185), (35, 605511), (45, 470953), (57, 371805), (63, 336395), (95, 223083), (105, 201837), (133, 159345), (171, 123935), (285, 74361), (315, 67279), (399, 53115), (665, 31869), (855, 24787), (1197, 17705), (1995, 10623), (3541, 5985)]