20402775

素因数分解:

$3^2\times 5^2\times {\mathrm{90679}}^1$

素因数の和:90695

約数の個数: 18

約数和(自身を含む): 36544040

約数和(自身を除く): 16141265

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 90679, 272037, 453395, 816111, 1360185, 2266975, 4080555, 6800925, 20402775]

約数ペア:

[(1, 20402775), (3, 6800925), (5, 4080555), (9, 2266975), (15, 1360185), (25, 816111), (45, 453395), (75, 272037), (225, 90679)]