21220810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{683}}^1$

素因数の和:942

約数の個数: 32

約数和(自身を含む): 41368320

約数和(自身を除く): 20147510

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 239, 478, 683, 1195, 1366, 2390, 3107, 3415, 6214, 6830, 8879, 15535, 17758, 31070, 44395, 88790, 163237, 326474, 816185, 1632370, 2122081, 4244162, 10610405, 21220810]

約数ペア:

[(1, 21220810), (2, 10610405), (5, 4244162), (10, 2122081), (13, 1632370), (26, 816185), (65, 326474), (130, 163237), (239, 88790), (478, 44395), (683, 31070), (1195, 17758), (1366, 15535), (2390, 8879), (3107, 6830), (3415, 6214)]