21288695

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1\times {\mathrm{313}}^1$

素因数の和:602

約数の個数: 16

約数和(自身を含む): 26164992

約数和(自身を除く): 4876297

約数列:

[1, 5, 61, 223, 305, 313, 1115, 1565, 13603, 19093, 68015, 69799, 95465, 348995, 4257739, 21288695]

約数ペア:

[(1, 21288695), (5, 4257739), (61, 348995), (223, 95465), (305, 69799), (313, 68015), (1115, 19093), (1565, 13603)]