19788730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{181}}^1$

素因数の和:259

約数の個数: 48

約数和(自身を含む): 39947544

約数和(自身を除く): 20158814

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 130, 145, 181, 290, 362, 377, 754, 841, 905, 1682, 1810, 1885, 2353, 3770, 4205, 4706, 5249, 8410, 10498, 10933, 11765, 21866, 23530, 26245, 52490, 54665, 68237, 109330, 136474, 152221, 304442, 341185, 682370, 761105, 1522210, 1978873, 3957746, 9894365, 19788730]

約数ペア:

[(1, 19788730), (2, 9894365), (5, 3957746), (10, 1978873), (13, 1522210), (26, 761105), (29, 682370), (58, 341185), (65, 304442), (130, 152221), (145, 136474), (181, 109330), (290, 68237), (362, 54665), (377, 52490), (754, 26245), (841, 23530), (905, 21866), (1682, 11765), (1810, 10933), (1885, 10498), (2353, 8410), (3770, 5249), (4205, 4706)]