20420090

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1889}}^1$

素因数の和:1966

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 18770950

約数列:

[1, 2, 5, 10, 23, 46, 47, 94, 115, 230, 235, 470, 1081, 1889, 2162, 3778, 5405, 9445, 10810, 18890, 43447, 86894, 88783, 177566, 217235, 434470, 443915, 887830, 2042009, 4084018, 10210045, 20420090]

約数ペア:

[(1, 20420090), (2, 10210045), (5, 4084018), (10, 2042009), (23, 887830), (46, 443915), (47, 434470), (94, 217235), (115, 177566), (230, 88783), (235, 86894), (470, 43447), (1081, 18890), (1889, 10810), (2162, 9445), (3778, 5405)]