21198612

素因数分解:

$2^2\times 3^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 50803200

約数和(自身を除く): 29604588

約数列:

[1, 2, 3, 4, 6, 12, 71, 139, 142, 179, 213, 278, 284, 358, 417, 426, 537, 556, 716, 834, 852, 1074, 1668, 2148, 9869, 12709, 19738, 24881, 25418, 29607, 38127, 39476, 49762, 50836, 59214, 74643, 76254, 99524, 118428, 149286, 152508, 298572, 1766551, 3533102, 5299653, 7066204, 10599306, 21198612]

約数ペア:

[(1, 21198612), (2, 10599306), (3, 7066204), (4, 5299653), (6, 3533102), (12, 1766551), (71, 298572), (139, 152508), (142, 149286), (179, 118428), (213, 99524), (278, 76254), (284, 74643), (358, 59214), (417, 50836), (426, 49762), (537, 39476), (556, 38127), (716, 29607), (834, 25418), (852, 24881), (1074, 19738), (1668, 12709), (2148, 9869)]