21813925

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4021}}^1$

素因数の和:4069

約数の個数: 24

約数和(自身を含む): 31918592

約数和(自身を除く): 10104667

約数列:

[1, 5, 7, 25, 31, 35, 155, 175, 217, 775, 1085, 4021, 5425, 20105, 28147, 100525, 124651, 140735, 623255, 703675, 872557, 3116275, 4362785, 21813925]

約数ペア:

[(1, 21813925), (5, 4362785), (7, 3116275), (25, 872557), (31, 703675), (35, 623255), (155, 140735), (175, 124651), (217, 100525), (775, 28147), (1085, 20105), (4021, 5425)]