21987324

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{971}}^1$

素因数の和:1035

約数の個数: 72

約数和(自身を含む): 60501168

約数和(自身を除く): 38513844

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 37, 51, 68, 74, 102, 111, 148, 153, 204, 222, 306, 333, 444, 612, 629, 666, 971, 1258, 1332, 1887, 1942, 2516, 2913, 3774, 3884, 5661, 5826, 7548, 8739, 11322, 11652, 16507, 17478, 22644, 33014, 34956, 35927, 49521, 66028, 71854, 99042, 107781, 143708, 148563, 198084, 215562, 297126, 323343, 431124, 594252, 610759, 646686, 1221518, 1293372, 1832277, 2443036, 3664554, 5496831, 7329108, 10993662, 21987324]

約数ペア:

[(1, 21987324), (2, 10993662), (3, 7329108), (4, 5496831), (6, 3664554), (9, 2443036), (12, 1832277), (17, 1293372), (18, 1221518), (34, 646686), (36, 610759), (37, 594252), (51, 431124), (68, 323343), (74, 297126), (102, 215562), (111, 198084), (148, 148563), (153, 143708), (204, 107781), (222, 99042), (306, 71854), (333, 66028), (444, 49521), (612, 35927), (629, 34956), (666, 33014), (971, 22644), (1258, 17478), (1332, 16507), (1887, 11652), (1942, 11322), (2516, 8739), (2913, 7548), (3774, 5826), (3884, 5661)]