21665828

素因数分解:

$2^2\times {\mathrm{131}}^1\times {\mathrm{173}}^1\times {\mathrm{239}}^1$

素因数の和:547

約数の個数: 24

約数和(自身を含む): 38586240

約数和(自身を除く): 16920412

約数列:

[1, 2, 4, 131, 173, 239, 262, 346, 478, 524, 692, 956, 22663, 31309, 41347, 45326, 62618, 82694, 90652, 125236, 165388, 5416457, 10832914, 21665828]

約数ペア:

[(1, 21665828), (2, 10832914), (4, 5416457), (131, 165388), (173, 125236), (239, 90652), (262, 82694), (346, 62618), (478, 45326), (524, 41347), (692, 31309), (956, 22663)]