20925820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{331}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 46015200

約数和(自身を除く): 25089380

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 109, 116, 145, 218, 290, 331, 436, 545, 580, 662, 1090, 1324, 1655, 2180, 3161, 3310, 6322, 6620, 9599, 12644, 15805, 19198, 31610, 36079, 38396, 47995, 63220, 72158, 95990, 144316, 180395, 191980, 360790, 721580, 1046291, 2092582, 4185164, 5231455, 10462910, 20925820]

約数ペア:

[(1, 20925820), (2, 10462910), (4, 5231455), (5, 4185164), (10, 2092582), (20, 1046291), (29, 721580), (58, 360790), (109, 191980), (116, 180395), (145, 144316), (218, 95990), (290, 72158), (331, 63220), (436, 47995), (545, 38396), (580, 36079), (662, 31610), (1090, 19198), (1324, 15805), (1655, 12644), (2180, 9599), (3161, 6620), (3310, 6322)]