21979685

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 33860736

約数和(自身を除く): 11881051

約数列:

[1, 5, 7, 13, 35, 49, 65, 67, 91, 103, 245, 335, 455, 469, 515, 637, 721, 871, 1339, 2345, 3185, 3283, 3605, 4355, 5047, 6097, 6695, 6901, 9373, 16415, 25235, 30485, 34505, 42679, 46865, 48307, 65611, 89713, 213395, 241535, 328055, 338149, 448565, 627991, 1690745, 3139955, 4395937, 21979685]

約数ペア:

[(1, 21979685), (5, 4395937), (7, 3139955), (13, 1690745), (35, 627991), (49, 448565), (65, 338149), (67, 328055), (91, 241535), (103, 213395), (245, 89713), (335, 65611), (455, 48307), (469, 46865), (515, 42679), (637, 34505), (721, 30485), (871, 25235), (1339, 16415), (2345, 9373), (3185, 6901), (3283, 6695), (3605, 6097), (4355, 5047)]