20201475

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{239}}^1$

素因数の和:289

約数の個数: 72

約数和(自身を含む): 40711680

約数和(自身を除く): 20510205

約数列:

[1, 3, 5, 7, 15, 21, 23, 25, 35, 49, 69, 75, 105, 115, 147, 161, 175, 239, 245, 345, 483, 525, 575, 717, 735, 805, 1127, 1195, 1225, 1673, 1725, 2415, 3381, 3585, 3675, 4025, 5019, 5497, 5635, 5975, 8365, 11711, 12075, 16491, 16905, 17925, 25095, 27485, 28175, 35133, 38479, 41825, 58555, 82455, 84525, 115437, 125475, 137425, 175665, 192395, 269353, 292775, 412275, 577185, 808059, 878325, 961975, 1346765, 2885925, 4040295, 6733825, 20201475]

約数ペア:

[(1, 20201475), (3, 6733825), (5, 4040295), (7, 2885925), (15, 1346765), (21, 961975), (23, 878325), (25, 808059), (35, 577185), (49, 412275), (69, 292775), (75, 269353), (105, 192395), (115, 175665), (147, 137425), (161, 125475), (175, 115437), (239, 84525), (245, 82455), (345, 58555), (483, 41825), (525, 38479), (575, 35133), (717, 28175), (735, 27485), (805, 25095), (1127, 17925), (1195, 16905), (1225, 16491), (1673, 12075), (1725, 11711), (2415, 8365), (3381, 5975), (3585, 5635), (3675, 5497), (4025, 5019)]