21808655

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12791}}^1$

素因数の和:12838

約数の個数: 16

約数和(自身を含む): 29472768

約数和(自身を除く): 7664113

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12791, 63955, 140701, 396521, 703505, 1982605, 4361731, 21808655]

約数ペア:

[(1, 21808655), (5, 4361731), (11, 1982605), (31, 703505), (55, 396521), (155, 140701), (341, 63955), (1705, 12791)]