19978392

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1091}}^1$

素因数の和:1216

約数の個数: 64

約数和(自身を含む): 57657600

約数和(自身を除く): 37679208

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 109, 168, 218, 327, 436, 654, 763, 872, 1091, 1308, 1526, 2182, 2289, 2616, 3052, 3273, 4364, 4578, 6104, 6546, 7637, 8728, 9156, 13092, 15274, 18312, 22911, 26184, 30548, 45822, 61096, 91644, 118919, 183288, 237838, 356757, 475676, 713514, 832433, 951352, 1427028, 1664866, 2497299, 2854056, 3329732, 4994598, 6659464, 9989196, 19978392]

約数ペア:

[(1, 19978392), (2, 9989196), (3, 6659464), (4, 4994598), (6, 3329732), (7, 2854056), (8, 2497299), (12, 1664866), (14, 1427028), (21, 951352), (24, 832433), (28, 713514), (42, 475676), (56, 356757), (84, 237838), (109, 183288), (168, 118919), (218, 91644), (327, 61096), (436, 45822), (654, 30548), (763, 26184), (872, 22911), (1091, 18312), (1308, 15274), (1526, 13092), (2182, 9156), (2289, 8728), (2616, 7637), (3052, 6546), (3273, 6104), (4364, 4578)]