18989515

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{1213}}^1$

素因数の和:1350

約数の個数: 16

約数和(自身を含む): 23774976

約数和(自身を除く): 4785461

約数列:

[1, 5, 31, 101, 155, 505, 1213, 3131, 6065, 15655, 37603, 122513, 188015, 612565, 3797903, 18989515]

約数ペア:

[(1, 18989515), (5, 3797903), (31, 612565), (101, 188015), (155, 122513), (505, 37603), (1213, 15655), (3131, 6065)]