20899575

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3203}}^1$

素因数の和:3248

約数の個数: 36

約数和(自身を含む): 38736360

約数和(自身を除く): 17836785

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3203, 6525, 9609, 16015, 28827, 48045, 80075, 92887, 144135, 240225, 278661, 464435, 720675, 835983, 1393305, 2322175, 4179915, 6966525, 20899575]

約数ペア:

[(1, 20899575), (3, 6966525), (5, 4179915), (9, 2322175), (15, 1393305), (25, 835983), (29, 720675), (45, 464435), (75, 278661), (87, 240225), (145, 144135), (225, 92887), (261, 80075), (435, 48045), (725, 28827), (1305, 16015), (2175, 9609), (3203, 6525)]