20578580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1051}}^1$

素因数の和:1160

約数の個数: 48

約数和(自身を含む): 47718720

約数和(自身を除く): 27140140

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1051, 1780, 1958, 2102, 3916, 4204, 4895, 5255, 9790, 10510, 11561, 19580, 21020, 23122, 46244, 57805, 93539, 115610, 187078, 231220, 374156, 467695, 935390, 1028929, 1870780, 2057858, 4115716, 5144645, 10289290, 20578580]

約数ペア:

[(1, 20578580), (2, 10289290), (4, 5144645), (5, 4115716), (10, 2057858), (11, 1870780), (20, 1028929), (22, 935390), (44, 467695), (55, 374156), (89, 231220), (110, 187078), (178, 115610), (220, 93539), (356, 57805), (445, 46244), (890, 23122), (979, 21020), (1051, 19580), (1780, 11561), (1958, 10510), (2102, 9790), (3916, 5255), (4204, 4895)]