21339325

素因数分解:

$5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1999}}^1$

素因数の和:2077

約数の個数: 24

約数和(自身を含む): 30752000

約数和(自身を除く): 9412675

約数列:

[1, 5, 7, 25, 35, 61, 175, 305, 427, 1525, 1999, 2135, 9995, 10675, 13993, 49975, 69965, 121939, 349825, 609695, 853573, 3048475, 4267865, 21339325]

約数ペア:

[(1, 21339325), (5, 4267865), (7, 3048475), (25, 853573), (35, 609695), (61, 349825), (175, 121939), (305, 69965), (427, 49975), (1525, 13993), (1999, 10675), (2135, 9995)]