18866379

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1229}}^1$

素因数の和:1299

約数の個数: 32

約数和(自身を含む): 31173120

約数和(自身を除く): 12306741

約数列:

[1, 3, 7, 17, 21, 43, 51, 119, 129, 301, 357, 731, 903, 1229, 2193, 3687, 5117, 8603, 15351, 20893, 25809, 52847, 62679, 146251, 158541, 369929, 438753, 898399, 1109787, 2695197, 6288793, 18866379]

約数ペア:

[(1, 18866379), (3, 6288793), (7, 2695197), (17, 1109787), (21, 898399), (43, 438753), (51, 369929), (119, 158541), (129, 146251), (301, 62679), (357, 52847), (731, 25809), (903, 20893), (1229, 15351), (2193, 8603), (3687, 5117)]