20121700

素因数分解:

$2^2\times 5^2\times {\mathrm{311}}^1\times {\mathrm{647}}^1$

素因数の和:972

約数の個数: 36

約数和(自身を含む): 43872192

約数和(自身を除く): 23750492

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 311, 622, 647, 1244, 1294, 1555, 2588, 3110, 3235, 6220, 6470, 7775, 12940, 15550, 16175, 31100, 32350, 64700, 201217, 402434, 804868, 1006085, 2012170, 4024340, 5030425, 10060850, 20121700]

約数ペア:

[(1, 20121700), (2, 10060850), (4, 5030425), (5, 4024340), (10, 2012170), (20, 1006085), (25, 804868), (50, 402434), (100, 201217), (311, 64700), (622, 32350), (647, 31100), (1244, 16175), (1294, 15550), (1555, 12940), (2588, 7775), (3110, 6470), (3235, 6220)]