21090874

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1$

素因数の和:323

約数の個数: 48

約数和(自身を含む): 39726720

約数和(自身を除く): 18635846

約数列:

[1, 2, 7, 14, 19, 38, 47, 49, 94, 98, 133, 241, 266, 329, 482, 658, 893, 931, 1687, 1786, 1862, 2303, 3374, 4579, 4606, 6251, 9158, 11327, 11809, 12502, 22654, 23618, 32053, 43757, 64106, 79289, 87514, 158578, 215213, 224371, 430426, 448742, 555023, 1110046, 1506491, 3012982, 10545437, 21090874]

約数ペア:

[(1, 21090874), (2, 10545437), (7, 3012982), (14, 1506491), (19, 1110046), (38, 555023), (47, 448742), (49, 430426), (94, 224371), (98, 215213), (133, 158578), (241, 87514), (266, 79289), (329, 64106), (482, 43757), (658, 32053), (893, 23618), (931, 22654), (1687, 12502), (1786, 11809), (1862, 11327), (2303, 9158), (3374, 6251), (4579, 4606)]