20909966

素因数分解:

$2^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1$

素因数の和:214

約数の個数: 64

約数和(自身を含む): 42508800

約数和(自身を除く): 21598834

約数列:

[1, 2, 7, 11, 14, 17, 22, 34, 49, 77, 98, 119, 154, 163, 187, 238, 326, 343, 374, 539, 686, 833, 1078, 1141, 1309, 1666, 1793, 2282, 2618, 2771, 3586, 3773, 5542, 5831, 7546, 7987, 9163, 11662, 12551, 15974, 18326, 19397, 25102, 30481, 38794, 55909, 60962, 64141, 87857, 111818, 128282, 135779, 175714, 213367, 271558, 426734, 614999, 950453, 1229998, 1493569, 1900906, 2987138, 10454983, 20909966]

約数ペア:

[(1, 20909966), (2, 10454983), (7, 2987138), (11, 1900906), (14, 1493569), (17, 1229998), (22, 950453), (34, 614999), (49, 426734), (77, 271558), (98, 213367), (119, 175714), (154, 135779), (163, 128282), (187, 111818), (238, 87857), (326, 64141), (343, 60962), (374, 55909), (539, 38794), (686, 30481), (833, 25102), (1078, 19397), (1141, 18326), (1309, 15974), (1666, 12551), (1793, 11662), (2282, 9163), (2618, 7987), (2771, 7546), (3586, 5831), (3773, 5542)]