21205550

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{13681}}^1$

素因数の和:13724

約数の個数: 24

約数和(自身を含む): 40717632

約数和(自身を除く): 19512082

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 775, 1550, 13681, 27362, 68405, 136810, 342025, 424111, 684050, 848222, 2120555, 4241110, 10602775, 21205550]

約数ペア:

[(1, 21205550), (2, 10602775), (5, 4241110), (10, 2120555), (25, 848222), (31, 684050), (50, 424111), (62, 342025), (155, 136810), (310, 68405), (775, 27362), (1550, 13681)]