21555405

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1483}}^1$

素因数の和:1530

約数の個数: 48

約数和(自身を含む): 41670720

約数和(自身を除く): 20115315

約数列:

[1, 3, 5, 9, 15, 17, 19, 45, 51, 57, 85, 95, 153, 171, 255, 285, 323, 765, 855, 969, 1483, 1615, 2907, 4449, 4845, 7415, 13347, 14535, 22245, 25211, 28177, 66735, 75633, 84531, 126055, 140885, 226899, 253593, 378165, 422655, 479009, 1134495, 1267965, 1437027, 2395045, 4311081, 7185135, 21555405]

約数ペア:

[(1, 21555405), (3, 7185135), (5, 4311081), (9, 2395045), (15, 1437027), (17, 1267965), (19, 1134495), (45, 479009), (51, 422655), (57, 378165), (85, 253593), (95, 226899), (153, 140885), (171, 126055), (255, 84531), (285, 75633), (323, 66735), (765, 28177), (855, 25211), (969, 22245), (1483, 14535), (1615, 13347), (2907, 7415), (4449, 4845)]