19278220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1399}}^1$

素因数の和:1474

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 25174580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 65, 106, 130, 212, 260, 265, 530, 689, 1060, 1378, 1399, 2756, 2798, 3445, 5596, 6890, 6995, 13780, 13990, 18187, 27980, 36374, 72748, 74147, 90935, 148294, 181870, 296588, 363740, 370735, 741470, 963911, 1482940, 1927822, 3855644, 4819555, 9639110, 19278220]

約数ペア:

[(1, 19278220), (2, 9639110), (4, 4819555), (5, 3855644), (10, 1927822), (13, 1482940), (20, 963911), (26, 741470), (52, 370735), (53, 363740), (65, 296588), (106, 181870), (130, 148294), (212, 90935), (260, 74147), (265, 72748), (530, 36374), (689, 27980), (1060, 18187), (1378, 13990), (1399, 13780), (2756, 6995), (2798, 6890), (3445, 5596)]