21030780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{857}}^1$

素因数の和:1278

約数の個数: 48

約数和(自身を含む): 59099040

約数和(自身を除く): 38068260

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 409, 818, 857, 1227, 1636, 1714, 2045, 2454, 2571, 3428, 4090, 4285, 4908, 5142, 6135, 8180, 8570, 10284, 12270, 12855, 17140, 24540, 25710, 51420, 350513, 701026, 1051539, 1402052, 1752565, 2103078, 3505130, 4206156, 5257695, 7010260, 10515390, 21030780]

約数ペア:

[(1, 21030780), (2, 10515390), (3, 7010260), (4, 5257695), (5, 4206156), (6, 3505130), (10, 2103078), (12, 1752565), (15, 1402052), (20, 1051539), (30, 701026), (60, 350513), (409, 51420), (818, 25710), (857, 24540), (1227, 17140), (1636, 12855), (1714, 12270), (2045, 10284), (2454, 8570), (2571, 8180), (3428, 6135), (4090, 5142), (4285, 4908)]