20631820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{491}}^1$

素因数の和:702

約数の個数: 48

約数和(自身を含む): 47609856

約数和(自身を除く): 26978036

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 491, 764, 955, 982, 1910, 1964, 2101, 2455, 3820, 4202, 4910, 5401, 8404, 9820, 10505, 10802, 21010, 21604, 27005, 42020, 54010, 93781, 108020, 187562, 375124, 468905, 937810, 1031591, 1875620, 2063182, 4126364, 5157955, 10315910, 20631820]

約数ペア:

[(1, 20631820), (2, 10315910), (4, 5157955), (5, 4126364), (10, 2063182), (11, 1875620), (20, 1031591), (22, 937810), (44, 468905), (55, 375124), (110, 187562), (191, 108020), (220, 93781), (382, 54010), (491, 42020), (764, 27005), (955, 21604), (982, 21010), (1910, 10802), (1964, 10505), (2101, 9820), (2455, 8404), (3820, 5401), (4202, 4910)]