19915870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{641}}^1$

素因数の和:900

約数の個数: 32

約数和(自身を含む): 38828160

約数和(自身を除く): 18912290

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 239, 478, 641, 1195, 1282, 2390, 3107, 3205, 6214, 6410, 8333, 15535, 16666, 31070, 41665, 83330, 153199, 306398, 765995, 1531990, 1991587, 3983174, 9957935, 19915870]

約数ペア:

[(1, 19915870), (2, 9957935), (5, 3983174), (10, 1991587), (13, 1531990), (26, 765995), (65, 306398), (130, 153199), (239, 83330), (478, 41665), (641, 31070), (1195, 16666), (1282, 15535), (2390, 8333), (3107, 6410), (3205, 6214)]