20791510

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:241

約数の個数: 64

約数和(自身を含む): 43001280

約数和(自身を除く): 22209770

約数列:

[1, 2, 5, 10, 17, 19, 34, 38, 41, 82, 85, 95, 157, 170, 190, 205, 314, 323, 410, 646, 697, 779, 785, 1394, 1558, 1570, 1615, 2669, 2983, 3230, 3485, 3895, 5338, 5966, 6437, 6970, 7790, 12874, 13243, 13345, 14915, 26486, 26690, 29830, 32185, 50711, 64370, 66215, 101422, 109429, 122303, 132430, 218858, 244606, 253555, 507110, 547145, 611515, 1094290, 1223030, 2079151, 4158302, 10395755, 20791510]

約数ペア:

[(1, 20791510), (2, 10395755), (5, 4158302), (10, 2079151), (17, 1223030), (19, 1094290), (34, 611515), (38, 547145), (41, 507110), (82, 253555), (85, 244606), (95, 218858), (157, 132430), (170, 122303), (190, 109429), (205, 101422), (314, 66215), (323, 64370), (410, 50711), (646, 32185), (697, 29830), (779, 26690), (785, 26486), (1394, 14915), (1558, 13345), (1570, 13243), (1615, 12874), (2669, 7790), (2983, 6970), (3230, 6437), (3485, 5966), (3895, 5338)]