18881668

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{659}}^1$

素因数の和:724

約数の個数: 48

約数和(自身を含む): 38808000

約数和(自身を除く): 19926332

約数列:

[1, 2, 4, 13, 19, 26, 29, 38, 52, 58, 76, 116, 247, 377, 494, 551, 659, 754, 988, 1102, 1318, 1508, 2204, 2636, 7163, 8567, 12521, 14326, 17134, 19111, 25042, 28652, 34268, 38222, 50084, 76444, 162773, 248443, 325546, 363109, 496886, 651092, 726218, 993772, 1452436, 4720417, 9440834, 18881668]

約数ペア:

[(1, 18881668), (2, 9440834), (4, 4720417), (13, 1452436), (19, 993772), (26, 726218), (29, 651092), (38, 496886), (52, 363109), (58, 325546), (76, 248443), (116, 162773), (247, 76444), (377, 50084), (494, 38222), (551, 34268), (659, 28652), (754, 25042), (988, 19111), (1102, 17134), (1318, 14326), (1508, 12521), (2204, 8567), (2636, 7163)]