21809925

素因数分解:

$3^3\times 5^2\times {\mathrm{79}}^1\times {\mathrm{409}}^1$

素因数の和:507

約数の個数: 48

約数和(自身を含む): 40672000

約数和(自身を除く): 18862075

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 79, 135, 225, 237, 395, 409, 675, 711, 1185, 1227, 1975, 2045, 2133, 3555, 3681, 5925, 6135, 10225, 10665, 11043, 17775, 18405, 30675, 32311, 53325, 55215, 92025, 96933, 161555, 276075, 290799, 484665, 807775, 872397, 1453995, 2423325, 4361985, 7269975, 21809925]

約数ペア:

[(1, 21809925), (3, 7269975), (5, 4361985), (9, 2423325), (15, 1453995), (25, 872397), (27, 807775), (45, 484665), (75, 290799), (79, 276075), (135, 161555), (225, 96933), (237, 92025), (395, 55215), (409, 53325), (675, 32311), (711, 30675), (1185, 18405), (1227, 17775), (1975, 11043), (2045, 10665), (2133, 10225), (3555, 6135), (3681, 5925)]