21473727

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{409}}^1$

素因数の和:503

約数の個数: 32

約数和(自身を含む): 32904960

約数和(自身を除く): 11431233

約数列:

[1, 3, 11, 33, 37, 43, 111, 129, 407, 409, 473, 1221, 1227, 1419, 1591, 4499, 4773, 13497, 15133, 17501, 17587, 45399, 52503, 52761, 166463, 193457, 499389, 580371, 650719, 1952157, 7157909, 21473727]

約数ペア:

[(1, 21473727), (3, 7157909), (11, 1952157), (33, 650719), (37, 580371), (43, 499389), (111, 193457), (129, 166463), (407, 52761), (409, 52503), (473, 45399), (1221, 17587), (1227, 17501), (1419, 15133), (1591, 13497), (4499, 4773)]