21207230

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 44755200

約数和(自身を除く): 23547970

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 73, 95, 110, 139, 146, 190, 209, 278, 365, 418, 695, 730, 803, 1045, 1387, 1390, 1529, 1606, 2090, 2641, 2774, 3058, 4015, 5282, 6935, 7645, 8030, 10147, 13205, 13870, 15257, 15290, 20294, 26410, 29051, 30514, 50735, 58102, 76285, 101470, 111617, 145255, 152570, 192793, 223234, 290510, 385586, 558085, 963965, 1116170, 1927930, 2120723, 4241446, 10603615, 21207230]

約数ペア:

[(1, 21207230), (2, 10603615), (5, 4241446), (10, 2120723), (11, 1927930), (19, 1116170), (22, 963965), (38, 558085), (55, 385586), (73, 290510), (95, 223234), (110, 192793), (139, 152570), (146, 145255), (190, 111617), (209, 101470), (278, 76285), (365, 58102), (418, 50735), (695, 30514), (730, 29051), (803, 26410), (1045, 20294), (1387, 15290), (1390, 15257), (1529, 13870), (1606, 13205), (2090, 10147), (2641, 8030), (2774, 7645), (3058, 6935), (4015, 5282)]