19643855

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 30878496

約数和(自身を除く): 11234641

約数列:

[1, 5, 7, 11, 35, 37, 49, 55, 77, 185, 197, 245, 259, 385, 407, 539, 985, 1295, 1379, 1813, 2035, 2167, 2695, 2849, 6895, 7289, 9065, 9653, 10835, 14245, 15169, 19943, 36445, 48265, 51023, 75845, 80179, 99715, 106183, 255115, 357161, 400895, 530915, 561253, 1785805, 2806265, 3928771, 19643855]

約数ペア:

[(1, 19643855), (5, 3928771), (7, 2806265), (11, 1785805), (35, 561253), (37, 530915), (49, 400895), (55, 357161), (77, 255115), (185, 106183), (197, 99715), (245, 80179), (259, 75845), (385, 51023), (407, 48265), (539, 36445), (985, 19943), (1295, 15169), (1379, 14245), (1813, 10835), (2035, 9653), (2167, 9065), (2695, 7289), (2849, 6895)]