20657997

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{433}}^1$

素因数の和:495

約数の個数: 40

約数和(自身を含む): 33608960

約数和(自身を除く): 12950963

約数列:

[1, 3, 9, 19, 27, 31, 57, 81, 93, 171, 279, 433, 513, 589, 837, 1299, 1539, 1767, 2511, 3897, 5301, 8227, 11691, 13423, 15903, 24681, 35073, 40269, 47709, 74043, 120807, 222129, 255037, 362421, 666387, 765111, 1087263, 2295333, 6885999, 20657997]

約数ペア:

[(1, 20657997), (3, 6885999), (9, 2295333), (19, 1087263), (27, 765111), (31, 666387), (57, 362421), (81, 255037), (93, 222129), (171, 120807), (279, 74043), (433, 47709), (513, 40269), (589, 35073), (837, 24681), (1299, 15903), (1539, 13423), (1767, 11691), (2511, 8227), (3897, 5301)]