20498758

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:245

約数の個数: 48

約数和(自身を含む): 38372400

約数和(自身を除く): 17873642

約数列:

[1, 2, 7, 14, 19, 38, 49, 98, 101, 109, 133, 202, 218, 266, 707, 763, 931, 1414, 1526, 1862, 1919, 2071, 3838, 4142, 4949, 5341, 9898, 10682, 11009, 13433, 14497, 22018, 26866, 28994, 77063, 94031, 101479, 154126, 188062, 202958, 209171, 418342, 539441, 1078882, 1464197, 2928394, 10249379, 20498758]

約数ペア:

[(1, 20498758), (2, 10249379), (7, 2928394), (14, 1464197), (19, 1078882), (38, 539441), (49, 418342), (98, 209171), (101, 202958), (109, 188062), (133, 154126), (202, 101479), (218, 94031), (266, 77063), (707, 28994), (763, 26866), (931, 22018), (1414, 14497), (1526, 13433), (1862, 11009), (1919, 10682), (2071, 9898), (3838, 5341), (4142, 4949)]