21505809

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{5059}}^1$

素因数の和:5184

約数の個数: 16

約数和(自身を含む): 31169600

約数和(自身を除く): 9663791

約数列:

[1, 3, 13, 39, 109, 327, 1417, 4251, 5059, 15177, 65767, 197301, 551431, 1654293, 7168603, 21505809]

約数ペア:

[(1, 21505809), (3, 7168603), (13, 1654293), (39, 551431), (109, 197301), (327, 65767), (1417, 15177), (4251, 5059)]