21219124

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^2\times {\mathrm{151}}^1$

素因数の和:260

約数の個数: 36

約数和(自身を含む): 40283040

約数和(自身を除く): 19063916

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 151, 172, 302, 604, 817, 1634, 1849, 2869, 3268, 3698, 5738, 6493, 7396, 11476, 12986, 25972, 35131, 70262, 123367, 140524, 246734, 279199, 493468, 558398, 1116796, 5304781, 10609562, 21219124]

約数ペア:

[(1, 21219124), (2, 10609562), (4, 5304781), (19, 1116796), (38, 558398), (43, 493468), (76, 279199), (86, 246734), (151, 140524), (172, 123367), (302, 70262), (604, 35131), (817, 25972), (1634, 12986), (1849, 11476), (2869, 7396), (3268, 6493), (3698, 5738)]