21871156775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{337}}^1\times {\mathrm{397}}^1\times {\mathrm{503}}^1$

素因数の和:1260

約数の個数: 48

約数和(自身を含む): 29425241664

約数和(自身を除く): 7554084889

約数列:

[1, 5, 13, 25, 65, 325, 337, 397, 503, 1685, 1985, 2515, 4381, 5161, 6539, 8425, 9925, 12575, 21905, 25805, 32695, 109525, 129025, 133789, 163475, 169511, 199691, 668945, 847555, 998455, 1739257, 2203643, 2595983, 3344725, 4237775, 4992275, 8696285, 11018215, 12979915, 43481425, 55091075, 64899575, 67295867, 336479335, 874846271, 1682396675, 4374231355, 21871156775]

約数ペア:

[(1, 21871156775), (5, 4374231355), (13, 1682396675), (25, 874846271), (65, 336479335), (325, 67295867), (337, 64899575), (397, 55091075), (503, 43481425), (1685, 12979915), (1985, 11018215), (2515, 8696285), (4381, 4992275), (5161, 4237775), (6539, 3344725), (8425, 2595983), (9925, 2203643), (12575, 1739257), (21905, 998455), (25805, 847555), (32695, 668945), (109525, 199691), (129025, 169511), (133789, 163475)]