21394665

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{439}}^1$

素因数の和:491

約数の個数: 48

約数和(自身を含む): 40233600

約数和(自身を除く): 18838935

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 361, 439, 513, 855, 1083, 1317, 1805, 2195, 2565, 3249, 3951, 5415, 6585, 8341, 9747, 11853, 16245, 19755, 25023, 41705, 48735, 59265, 75069, 125115, 158479, 225207, 375345, 475437, 792395, 1126035, 1426311, 2377185, 4278933, 7131555, 21394665]

約数ペア:

[(1, 21394665), (3, 7131555), (5, 4278933), (9, 2377185), (15, 1426311), (19, 1126035), (27, 792395), (45, 475437), (57, 375345), (95, 225207), (135, 158479), (171, 125115), (285, 75069), (361, 59265), (439, 48735), (513, 41705), (855, 25023), (1083, 19755), (1317, 16245), (1805, 11853), (2195, 9747), (2565, 8341), (3249, 6585), (3951, 5415)]