20497700

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{2887}}^1$

素因数の和:2972

約数の個数: 36

約数和(自身を含む): 45122112

約数和(自身を除く): 24624412

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 142, 284, 355, 710, 1420, 1775, 2887, 3550, 5774, 7100, 11548, 14435, 28870, 57740, 72175, 144350, 204977, 288700, 409954, 819908, 1024885, 2049770, 4099540, 5124425, 10248850, 20497700]

約数ペア:

[(1, 20497700), (2, 10248850), (4, 5124425), (5, 4099540), (10, 2049770), (20, 1024885), (25, 819908), (50, 409954), (71, 288700), (100, 204977), (142, 144350), (284, 72175), (355, 57740), (710, 28870), (1420, 14435), (1775, 11548), (2887, 7100), (3550, 5774)]