19928840

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{3923}}^1$

素因数の和:4061

約数の個数: 32

約数和(自身を含む): 45204480

約数和(自身を除く): 25275640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 3923, 5080, 7846, 15692, 19615, 31384, 39230, 78460, 156920, 498221, 996442, 1992884, 2491105, 3985768, 4982210, 9964420, 19928840]

約数ペア:

[(1, 19928840), (2, 9964420), (4, 4982210), (5, 3985768), (8, 2491105), (10, 1992884), (20, 996442), (40, 498221), (127, 156920), (254, 78460), (508, 39230), (635, 31384), (1016, 19615), (1270, 15692), (2540, 7846), (3923, 5080)]