21956660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 52106208

約数和(自身を除く): 30149548

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 121, 172, 211, 215, 220, 242, 422, 430, 473, 484, 605, 844, 860, 946, 1055, 1210, 1892, 2110, 2321, 2365, 2420, 4220, 4642, 4730, 5203, 9073, 9284, 9460, 10406, 11605, 18146, 20812, 23210, 25531, 26015, 36292, 45365, 46420, 51062, 52030, 90730, 99803, 102124, 104060, 127655, 181460, 199606, 255310, 399212, 499015, 510620, 998030, 1097833, 1996060, 2195666, 4391332, 5489165, 10978330, 21956660]

約数ペア:

[(1, 21956660), (2, 10978330), (4, 5489165), (5, 4391332), (10, 2195666), (11, 1996060), (20, 1097833), (22, 998030), (43, 510620), (44, 499015), (55, 399212), (86, 255310), (110, 199606), (121, 181460), (172, 127655), (211, 104060), (215, 102124), (220, 99803), (242, 90730), (422, 52030), (430, 51062), (473, 46420), (484, 45365), (605, 36292), (844, 26015), (860, 25531), (946, 23210), (1055, 20812), (1210, 18146), (1892, 11605), (2110, 10406), (2321, 9460), (2365, 9284), (2420, 9073), (4220, 5203), (4642, 4730)]