21818005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{13679}}^1$

素因数の和:13724

約数の個数: 16

約数和(自身を含む): 29548800

約数和(自身を除く): 7730795

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 13679, 68395, 150469, 396691, 752345, 1983455, 4363601, 21818005]

約数ペア:

[(1, 21818005), (5, 4363601), (11, 1983455), (29, 752345), (55, 396691), (145, 150469), (319, 68395), (1595, 13679)]