161887640

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{19181}}^1$

素因数の和:19403

約数の個数: 32

約数和(自身を含む): 365992560

約数和(自身を除く): 204104920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 19181, 38362, 76724, 95905, 153448, 191810, 383620, 767240, 4047191, 8094382, 16188764, 20235955, 32377528, 40471910, 80943820, 161887640]

約数ペア:

[(1, 161887640), (2, 80943820), (4, 40471910), (5, 32377528), (8, 20235955), (10, 16188764), (20, 8094382), (40, 4047191), (211, 767240), (422, 383620), (844, 191810), (1055, 153448), (1688, 95905), (2110, 76724), (4220, 38362), (8440, 19181)]