21089960

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18181}}^1$

素因数の和:18221

約数の個数: 32

約数和(自身を含む): 49091400

約数和(自身を除く): 28001440

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18181, 36362, 72724, 90905, 145448, 181810, 363620, 527249, 727240, 1054498, 2108996, 2636245, 4217992, 5272490, 10544980, 21089960]

約数ペア:

[(1, 21089960), (2, 10544980), (4, 5272490), (5, 4217992), (8, 2636245), (10, 2108996), (20, 1054498), (29, 727240), (40, 527249), (58, 363620), (116, 181810), (145, 145448), (232, 90905), (290, 72724), (580, 36362), (1160, 18181)]