199909820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{4003}}^1$

素因数の和:4250

約数の個数: 48

約数和(自身を含む): 460107648

約数和(自身を除く): 260197828

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 227, 454, 908, 1135, 2270, 2497, 4003, 4540, 4994, 8006, 9988, 12485, 16012, 20015, 24970, 40030, 44033, 49940, 80060, 88066, 176132, 220165, 440330, 880660, 908681, 1817362, 3634724, 4543405, 9086810, 9995491, 18173620, 19990982, 39981964, 49977455, 99954910, 199909820]

約数ペア:

[(1, 199909820), (2, 99954910), (4, 49977455), (5, 39981964), (10, 19990982), (11, 18173620), (20, 9995491), (22, 9086810), (44, 4543405), (55, 3634724), (110, 1817362), (220, 908681), (227, 880660), (454, 440330), (908, 220165), (1135, 176132), (2270, 88066), (2497, 80060), (4003, 49940), (4540, 44033), (4994, 40030), (8006, 24970), (9988, 20015), (12485, 16012)]