21165507

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{439}}^1\times {\mathrm{487}}^1$

素因数の和:943

約数の個数: 24

約数和(自身を含む): 33496320

約数和(自身を除く): 12330813

約数列:

[1, 3, 9, 11, 33, 99, 439, 487, 1317, 1461, 3951, 4383, 4829, 5357, 14487, 16071, 43461, 48213, 213793, 641379, 1924137, 2351723, 7055169, 21165507]

約数ペア:

[(1, 21165507), (3, 7055169), (9, 2351723), (11, 1924137), (33, 641379), (99, 213793), (439, 48213), (487, 43461), (1317, 16071), (1461, 14487), (3951, 5357), (4383, 4829)]