21181821

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{1319}}^1$

素因数の和:1476

約数の個数: 16

約数和(自身を含む): 29082240

約数和(自身を除く): 7900419

約数列:

[1, 3, 53, 101, 159, 303, 1319, 3957, 5353, 16059, 69907, 133219, 209721, 399657, 7060607, 21181821]

約数ペア:

[(1, 21181821), (3, 7060607), (53, 399657), (101, 209721), (159, 133219), (303, 69907), (1319, 16059), (3957, 5353)]