21007575

素因数分解:

$3^2\times 5^2\times {\mathrm{73}}^1\times {\mathrm{1279}}^1$

素因数の和:1368

約数の個数: 36

約数和(自身を含む): 38172160

約数和(自身を除く): 17164585

約数列:

[1, 3, 5, 9, 15, 25, 45, 73, 75, 219, 225, 365, 657, 1095, 1279, 1825, 3285, 3837, 5475, 6395, 11511, 16425, 19185, 31975, 57555, 93367, 95925, 280101, 287775, 466835, 840303, 1400505, 2334175, 4201515, 7002525, 21007575]

約数ペア:

[(1, 21007575), (3, 7002525), (5, 4201515), (9, 2334175), (15, 1400505), (25, 840303), (45, 466835), (73, 287775), (75, 280101), (219, 95925), (225, 93367), (365, 57555), (657, 31975), (1095, 19185), (1279, 16425), (1825, 11511), (3285, 6395), (3837, 5475)]