21277160

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17159}}^1$

素因数の和:17201

約数の個数: 32

約数和(自身を含む): 49420800

約数和(自身を除く): 28143640

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17159, 34318, 68636, 85795, 137272, 171590, 343180, 531929, 686360, 1063858, 2127716, 2659645, 4255432, 5319290, 10638580, 21277160]

約数ペア:

[(1, 21277160), (2, 10638580), (4, 5319290), (5, 4255432), (8, 2659645), (10, 2127716), (20, 1063858), (31, 686360), (40, 531929), (62, 343180), (124, 171590), (155, 137272), (248, 85795), (310, 68636), (620, 34318), (1240, 17159)]