19806800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^2\times {\mathrm{293}}^1$

素因数の和:337

約数の個数: 90

約数和(自身を含む): 51703722

約数和(自身を除く): 31896922

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 169, 200, 208, 260, 293, 325, 338, 400, 520, 586, 650, 676, 845, 1040, 1172, 1300, 1352, 1465, 1690, 2344, 2600, 2704, 2930, 3380, 3809, 4225, 4688, 5200, 5860, 6760, 7325, 7618, 8450, 11720, 13520, 14650, 15236, 16900, 19045, 23440, 29300, 30472, 33800, 38090, 49517, 58600, 60944, 67600, 76180, 95225, 99034, 117200, 152360, 190450, 198068, 247585, 304720, 380900, 396136, 495170, 761800, 792272, 990340, 1237925, 1523600, 1980680, 2475850, 3961360, 4951700, 9903400, 19806800]

約数ペア:

[(1, 19806800), (2, 9903400), (4, 4951700), (5, 3961360), (8, 2475850), (10, 1980680), (13, 1523600), (16, 1237925), (20, 990340), (25, 792272), (26, 761800), (40, 495170), (50, 396136), (52, 380900), (65, 304720), (80, 247585), (100, 198068), (104, 190450), (130, 152360), (169, 117200), (200, 99034), (208, 95225), (260, 76180), (293, 67600), (325, 60944), (338, 58600), (400, 49517), (520, 38090), (586, 33800), (650, 30472), (676, 29300), (845, 23440), (1040, 19045), (1172, 16900), (1300, 15236), (1352, 14650), (1465, 13520), (1690, 11720), (2344, 8450), (2600, 7618), (2704, 7325), (2930, 6760), (3380, 5860), (3809, 5200), (4225, 4688)]