21427953

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 31570560

約数和(自身を除く): 10142607

約数列:

[1, 3, 19, 41, 53, 57, 123, 159, 173, 519, 779, 1007, 2173, 2337, 3021, 3287, 6519, 7093, 9169, 9861, 21279, 27507, 41287, 123861, 134767, 174211, 375929, 404301, 522633, 1127787, 7142651, 21427953]

約数ペア:

[(1, 21427953), (3, 7142651), (19, 1127787), (41, 522633), (53, 404301), (57, 375929), (123, 174211), (159, 134767), (173, 123861), (519, 41287), (779, 27507), (1007, 21279), (2173, 9861), (2337, 9169), (3021, 7093), (3287, 6519)]