19889240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{283}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 51528960

約数和(自身を除く): 31639720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 251, 280, 283, 502, 566, 1004, 1132, 1255, 1415, 1757, 1981, 2008, 2264, 2510, 2830, 3514, 3962, 5020, 5660, 7028, 7924, 8785, 9905, 10040, 11320, 14056, 15848, 17570, 19810, 35140, 39620, 70280, 71033, 79240, 142066, 284132, 355165, 497231, 568264, 710330, 994462, 1420660, 1988924, 2486155, 2841320, 3977848, 4972310, 9944620, 19889240]

約数ペア:

[(1, 19889240), (2, 9944620), (4, 4972310), (5, 3977848), (7, 2841320), (8, 2486155), (10, 1988924), (14, 1420660), (20, 994462), (28, 710330), (35, 568264), (40, 497231), (56, 355165), (70, 284132), (140, 142066), (251, 79240), (280, 71033), (283, 70280), (502, 39620), (566, 35140), (1004, 19810), (1132, 17570), (1255, 15848), (1415, 14056), (1757, 11320), (1981, 10040), (2008, 9905), (2264, 8785), (2510, 7924), (2830, 7028), (3514, 5660), (3962, 5020)]