21800720

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3733}}^1$

素因数の和:3819

約数の個数: 40

約数和(自身を含む): 51394776

約数和(自身を除く): 29594056

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3733, 5840, 7466, 14932, 18665, 29864, 37330, 59728, 74660, 149320, 272509, 298640, 545018, 1090036, 1362545, 2180072, 2725090, 4360144, 5450180, 10900360, 21800720]

約数ペア:

[(1, 21800720), (2, 10900360), (4, 5450180), (5, 4360144), (8, 2725090), (10, 2180072), (16, 1362545), (20, 1090036), (40, 545018), (73, 298640), (80, 272509), (146, 149320), (292, 74660), (365, 59728), (584, 37330), (730, 29864), (1168, 18665), (1460, 14932), (2920, 7466), (3733, 5840)]