219902980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{1021}}^1$

素因数の和:1141

約数の個数: 72

約数和(自身を含む): 513800280

約数和(自身を除く): 293897300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 121, 178, 220, 242, 356, 445, 484, 605, 890, 979, 1021, 1210, 1780, 1958, 2042, 2420, 3916, 4084, 4895, 5105, 9790, 10210, 10769, 11231, 19580, 20420, 21538, 22462, 43076, 44924, 53845, 56155, 90869, 107690, 112310, 123541, 181738, 215380, 224620, 247082, 363476, 454345, 494164, 617705, 908690, 999559, 1235410, 1817380, 1999118, 2470820, 3998236, 4997795, 9995590, 10995149, 19991180, 21990298, 43980596, 54975745, 109951490, 219902980]

約数ペア:

[(1, 219902980), (2, 109951490), (4, 54975745), (5, 43980596), (10, 21990298), (11, 19991180), (20, 10995149), (22, 9995590), (44, 4997795), (55, 3998236), (89, 2470820), (110, 1999118), (121, 1817380), (178, 1235410), (220, 999559), (242, 908690), (356, 617705), (445, 494164), (484, 454345), (605, 363476), (890, 247082), (979, 224620), (1021, 215380), (1210, 181738), (1780, 123541), (1958, 112310), (2042, 107690), (2420, 90869), (3916, 56155), (4084, 53845), (4895, 44924), (5105, 43076), (9790, 22462), (10210, 21538), (10769, 20420), (11231, 19580)]