21801873

素因数分解:

$3^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{491}}^1$

素因数の和:573

約数の個数: 24

約数和(自身を含む): 31491936

約数和(自身を除く): 9690063

約数列:

[1, 3, 19, 41, 57, 123, 361, 491, 779, 1083, 1473, 2337, 9329, 14801, 20131, 27987, 44403, 60393, 177251, 382489, 531753, 1147467, 7267291, 21801873]

約数ペア:

[(1, 21801873), (3, 7267291), (19, 1147467), (41, 531753), (57, 382489), (123, 177251), (361, 60393), (491, 44403), (779, 27987), (1083, 20131), (1473, 14801), (2337, 9329)]