21022815

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{1237}}^1$

素因数の和:1359

約数の個数: 32

約数和(自身を含む): 37080576

約数和(自身を除く): 16057761

約数列:

[1, 3, 5, 11, 15, 33, 55, 103, 165, 309, 515, 1133, 1237, 1545, 3399, 3711, 5665, 6185, 13607, 16995, 18555, 40821, 68035, 127411, 204105, 382233, 637055, 1401521, 1911165, 4204563, 7007605, 21022815]

約数ペア:

[(1, 21022815), (3, 7007605), (5, 4204563), (11, 1911165), (15, 1401521), (33, 637055), (55, 382233), (103, 204105), (165, 127411), (309, 68035), (515, 40821), (1133, 18555), (1237, 16995), (1545, 13607), (3399, 6185), (3711, 5665)]