21496140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{389}}^1$

素因数の和:711

約数の個数: 72

約数和(自身を含む): 65585520

約数和(自身を除く): 44089380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 307, 389, 614, 778, 921, 1167, 1228, 1535, 1556, 1842, 1945, 2334, 2763, 3070, 3501, 3684, 3890, 4605, 4668, 5526, 5835, 6140, 7002, 7780, 9210, 11052, 11670, 13815, 14004, 17505, 18420, 23340, 27630, 35010, 55260, 70020, 119423, 238846, 358269, 477692, 597115, 716538, 1074807, 1194230, 1433076, 1791345, 2149614, 2388460, 3582690, 4299228, 5374035, 7165380, 10748070, 21496140]

約数ペア:

[(1, 21496140), (2, 10748070), (3, 7165380), (4, 5374035), (5, 4299228), (6, 3582690), (9, 2388460), (10, 2149614), (12, 1791345), (15, 1433076), (18, 1194230), (20, 1074807), (30, 716538), (36, 597115), (45, 477692), (60, 358269), (90, 238846), (180, 119423), (307, 70020), (389, 55260), (614, 35010), (778, 27630), (921, 23340), (1167, 18420), (1228, 17505), (1535, 14004), (1556, 13815), (1842, 11670), (1945, 11052), (2334, 9210), (2763, 7780), (3070, 7002), (3501, 6140), (3684, 5835), (3890, 5526), (4605, 4668)]