20971118

素因数分解:

$2^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:249

約数の個数: 48

約数和(自身を含む): 38905920

約数和(自身を除く): 17934802

約数列:

[1, 2, 7, 14, 29, 47, 49, 58, 94, 98, 157, 203, 314, 329, 406, 658, 1099, 1363, 1421, 2198, 2303, 2726, 2842, 4553, 4606, 7379, 7693, 9106, 9541, 14758, 15386, 19082, 31871, 51653, 63742, 66787, 103306, 133574, 213991, 223097, 361571, 427982, 446194, 723142, 1497937, 2995874, 10485559, 20971118]

約数ペア:

[(1, 20971118), (2, 10485559), (7, 2995874), (14, 1497937), (29, 723142), (47, 446194), (49, 427982), (58, 361571), (94, 223097), (98, 213991), (157, 133574), (203, 103306), (314, 66787), (329, 63742), (406, 51653), (658, 31871), (1099, 19082), (1363, 15386), (1421, 14758), (2198, 9541), (2303, 9106), (2726, 7693), (2842, 7379), (4553, 4606)]