21277780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{34319}}^1$

素因数の和:34359

約数の個数: 24

約数和(自身を含む): 46126080

約数和(自身を除く): 24848300

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 34319, 68638, 137276, 171595, 343190, 686380, 1063889, 2127778, 4255556, 5319445, 10638890, 21277780]

約数ペア:

[(1, 21277780), (2, 10638890), (4, 5319445), (5, 4255556), (10, 2127778), (20, 1063889), (31, 686380), (62, 343190), (124, 171595), (155, 137276), (310, 68638), (620, 34319)]