21285855

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5437}}^1$

素因数の和:5480

約数の個数: 32

約数和(自身を含む): 39153600

約数和(自身を除く): 17867745

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5437, 16311, 27185, 48933, 81555, 146799, 157673, 244665, 473019, 733995, 788365, 1419057, 2365095, 4257171, 7095285, 21285855]

約数ペア:

[(1, 21285855), (3, 7095285), (5, 4257171), (9, 2365095), (15, 1419057), (27, 788365), (29, 733995), (45, 473019), (87, 244665), (135, 157673), (145, 146799), (261, 81555), (435, 48933), (783, 27185), (1305, 16311), (3915, 5437)]