20911550

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{197}}^1$

素因数の和:413

約数の個数: 48

約数和(自身を含む): 42867792

約数和(自身を除く): 21956242

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 193, 197, 275, 386, 394, 550, 965, 985, 1930, 1970, 2123, 2167, 4246, 4334, 4825, 4925, 9650, 9850, 10615, 10835, 21230, 21670, 38021, 53075, 54175, 76042, 106150, 108350, 190105, 380210, 418231, 836462, 950525, 1901050, 2091155, 4182310, 10455775, 20911550]

約数ペア:

[(1, 20911550), (2, 10455775), (5, 4182310), (10, 2091155), (11, 1901050), (22, 950525), (25, 836462), (50, 418231), (55, 380210), (110, 190105), (193, 108350), (197, 106150), (275, 76042), (386, 54175), (394, 53075), (550, 38021), (965, 21670), (985, 21230), (1930, 10835), (1970, 10615), (2123, 9850), (2167, 9650), (4246, 4925), (4334, 4825)]