21606981

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{13931}}^1$

素因数の和:13992

約数の個数: 16

約数和(自身を含む): 32099328

約数和(自身を除く): 10492347

約数列:

[1, 3, 11, 33, 47, 141, 517, 1551, 13931, 41793, 153241, 459723, 654757, 1964271, 7202327, 21606981]

約数ペア:

[(1, 21606981), (3, 7202327), (11, 1964271), (33, 654757), (47, 459723), (141, 153241), (517, 41793), (1551, 13931)]