20989585

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{2027}}^1$

素因数の和:2160

約数の個数: 16

約数和(自身を含む): 26769600

約数和(自身を除く): 5780015

約数列:

[1, 5, 19, 95, 109, 545, 2027, 2071, 10135, 10355, 38513, 192565, 220943, 1104715, 4197917, 20989585]

約数ペア:

[(1, 20989585), (5, 4197917), (19, 1104715), (95, 220943), (109, 192565), (545, 38513), (2027, 10355), (2071, 10135)]