21025390

素因数分解:

$2^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:396

約数の個数: 32

約数和(自身を含む): 38750400

約数和(自身を除く): 17725010

約数列:

[1, 2, 5, 10, 103, 137, 149, 206, 274, 298, 515, 685, 745, 1030, 1370, 1490, 14111, 15347, 20413, 28222, 30694, 40826, 70555, 76735, 102065, 141110, 153470, 204130, 2102539, 4205078, 10512695, 21025390]

約数ペア:

[(1, 21025390), (2, 10512695), (5, 4205078), (10, 2102539), (103, 204130), (137, 153470), (149, 141110), (206, 102065), (274, 76735), (298, 70555), (515, 40826), (685, 30694), (745, 28222), (1030, 20413), (1370, 15347), (1490, 14111)]