21205756

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{283}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 44085888

約数和(自身を除く): 22880132

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 131, 143, 262, 283, 286, 524, 566, 572, 1132, 1441, 1703, 2882, 3113, 3406, 3679, 5764, 6226, 6812, 7358, 12452, 14716, 18733, 37073, 37466, 40469, 74146, 74932, 80938, 148292, 161876, 407803, 481949, 815606, 963898, 1631212, 1927796, 5301439, 10602878, 21205756]

約数ペア:

[(1, 21205756), (2, 10602878), (4, 5301439), (11, 1927796), (13, 1631212), (22, 963898), (26, 815606), (44, 481949), (52, 407803), (131, 161876), (143, 148292), (262, 80938), (283, 74932), (286, 74146), (524, 40469), (566, 37466), (572, 37073), (1132, 18733), (1441, 14716), (1703, 12452), (2882, 7358), (3113, 6812), (3406, 6226), (3679, 5764)]