21291505

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{283}}^1\times {\mathrm{367}}^1$

素因数の和:696

約数の個数: 16

約数和(自身を含む): 26337024

約数和(自身を除く): 5045519

約数列:

[1, 5, 41, 205, 283, 367, 1415, 1835, 11603, 15047, 58015, 75235, 103861, 519305, 4258301, 21291505]

約数ペア:

[(1, 21291505), (5, 4258301), (41, 519305), (205, 103861), (283, 75235), (367, 58015), (1415, 15047), (1835, 11603)]