21268940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1973}}^1$

素因数の和:2007

約数の個数: 72

約数和(自身を含む): 56709072

約数和(自身を除く): 35440132

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 980, 1078, 1540, 1973, 2156, 2695, 3946, 5390, 7892, 9865, 10780, 13811, 19730, 21703, 27622, 39460, 43406, 55244, 69055, 86812, 96677, 108515, 138110, 151921, 193354, 217030, 276220, 303842, 386708, 434060, 483385, 607684, 759605, 966770, 1063447, 1519210, 1933540, 2126894, 3038420, 4253788, 5317235, 10634470, 21268940]

約数ペア:

[(1, 21268940), (2, 10634470), (4, 5317235), (5, 4253788), (7, 3038420), (10, 2126894), (11, 1933540), (14, 1519210), (20, 1063447), (22, 966770), (28, 759605), (35, 607684), (44, 483385), (49, 434060), (55, 386708), (70, 303842), (77, 276220), (98, 217030), (110, 193354), (140, 151921), (154, 138110), (196, 108515), (220, 96677), (245, 86812), (308, 69055), (385, 55244), (490, 43406), (539, 39460), (770, 27622), (980, 21703), (1078, 19730), (1540, 13811), (1973, 10780), (2156, 9865), (2695, 7892), (3946, 5390)]