21980013

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{151}}^1\times {\mathrm{401}}^1$

素因数の和:577

約数の個数: 24

約数和(自身を含む): 32507328

約数和(自身を除く): 10527315

約数列:

[1, 3, 11, 33, 121, 151, 363, 401, 453, 1203, 1661, 4411, 4983, 13233, 18271, 48521, 54813, 60551, 145563, 181653, 666061, 1998183, 7326671, 21980013]

約数ペア:

[(1, 21980013), (3, 7326671), (11, 1998183), (33, 666061), (121, 181653), (151, 145563), (363, 60551), (401, 54813), (453, 48521), (1203, 18271), (1661, 13233), (4411, 4983)]