19996658

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{421}}^1$

素因数の和:578

約数の個数: 32

約数和(自身を含む): 35002368

約数和(自身を除く): 15005710

約数列:

[1, 2, 11, 17, 22, 34, 127, 187, 254, 374, 421, 842, 1397, 2159, 2794, 4318, 4631, 7157, 9262, 14314, 23749, 47498, 53467, 78727, 106934, 157454, 588137, 908939, 1176274, 1817878, 9998329, 19996658]

約数ペア:

[(1, 19996658), (2, 9998329), (11, 1817878), (17, 1176274), (22, 908939), (34, 588137), (127, 157454), (187, 106934), (254, 78727), (374, 53467), (421, 47498), (842, 23749), (1397, 14314), (2159, 9262), (2794, 7157), (4318, 4631)]