21027175

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 30623040

約数和(自身を除く): 9595865

約数列:

[1, 5, 13, 23, 25, 29, 65, 97, 115, 145, 299, 325, 377, 485, 575, 667, 725, 1261, 1495, 1885, 2231, 2425, 2813, 3335, 6305, 7475, 8671, 9425, 11155, 14065, 16675, 29003, 31525, 36569, 43355, 55775, 64699, 70325, 145015, 182845, 216775, 323495, 725075, 841087, 914225, 1617475, 4205435, 21027175]

約数ペア:

[(1, 21027175), (5, 4205435), (13, 1617475), (23, 914225), (25, 841087), (29, 725075), (65, 323495), (97, 216775), (115, 182845), (145, 145015), (299, 70325), (325, 64699), (377, 55775), (485, 43355), (575, 36569), (667, 31525), (725, 29003), (1261, 16675), (1495, 14065), (1885, 11155), (2231, 9425), (2425, 8671), (2813, 7475), (3335, 6305)]