18712902

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:229

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 23865018

約数列:

[1, 2, 3, 6, 13, 26, 31, 39, 62, 71, 78, 93, 109, 142, 186, 213, 218, 327, 403, 426, 654, 806, 923, 1209, 1417, 1846, 2201, 2418, 2769, 2834, 3379, 4251, 4402, 5538, 6603, 6758, 7739, 8502, 10137, 13206, 15478, 20274, 23217, 28613, 43927, 46434, 57226, 85839, 87854, 100607, 131781, 171678, 201214, 239909, 263562, 301821, 479818, 603642, 719727, 1439454, 3118817, 6237634, 9356451, 18712902]

約数ペア:

[(1, 18712902), (2, 9356451), (3, 6237634), (6, 3118817), (13, 1439454), (26, 719727), (31, 603642), (39, 479818), (62, 301821), (71, 263562), (78, 239909), (93, 201214), (109, 171678), (142, 131781), (186, 100607), (213, 87854), (218, 85839), (327, 57226), (403, 46434), (426, 43927), (654, 28613), (806, 23217), (923, 20274), (1209, 15478), (1417, 13206), (1846, 10137), (2201, 8502), (2418, 7739), (2769, 6758), (2834, 6603), (3379, 5538), (4251, 4402)]