19973821

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{479}}^1$

素因数の和:553

約数の個数: 24

約数和(自身を含む): 24952320

約数和(自身を除く): 4978499

約数列:

[1, 7, 23, 37, 49, 161, 259, 479, 851, 1127, 1813, 3353, 5957, 11017, 17723, 23471, 41699, 77119, 124061, 407629, 539833, 868427, 2853403, 19973821]

約数ペア:

[(1, 19973821), (7, 2853403), (23, 868427), (37, 539833), (49, 407629), (161, 124061), (259, 77119), (479, 41699), (851, 23471), (1127, 17723), (1813, 11017), (3353, 5957)]