21306855

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1\times {\mathrm{409}}^1$

素因数の和:591

約数の個数: 32

約数和(自身を含む): 35896320

約数和(自身を除く): 14589465

約数列:

[1, 3, 5, 15, 23, 69, 115, 151, 345, 409, 453, 755, 1227, 2045, 2265, 3473, 6135, 9407, 10419, 17365, 28221, 47035, 52095, 61759, 141105, 185277, 308795, 926385, 1420457, 4261371, 7102285, 21306855]

約数ペア:

[(1, 21306855), (3, 7102285), (5, 4261371), (15, 1420457), (23, 926385), (69, 308795), (115, 185277), (151, 141105), (345, 61759), (409, 52095), (453, 47035), (755, 28221), (1227, 17365), (2045, 10419), (2265, 9407), (3473, 6135)]