20121040

素因数分解:

$2^4\times 5^1\times {\mathrm{251513}}^1$

素因数の和:251526

約数の個数: 20

約数和(自身を含む): 46781604

約数和(自身を除く): 26660564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251513, 503026, 1006052, 1257565, 2012104, 2515130, 4024208, 5030260, 10060520, 20121040]

約数ペア:

[(1, 20121040), (2, 10060520), (4, 5030260), (5, 4024208), (8, 2515130), (10, 2012104), (16, 1257565), (20, 1006052), (40, 503026), (80, 251513)]