20507740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{97}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 49046256

約数和(自身を除く): 28538516

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 97, 110, 124, 155, 194, 220, 310, 341, 388, 485, 620, 682, 961, 970, 1067, 1364, 1705, 1922, 1940, 2134, 3007, 3410, 3844, 4268, 4805, 5335, 6014, 6820, 9610, 10571, 10670, 12028, 15035, 19220, 21142, 21340, 30070, 33077, 42284, 52855, 60140, 66154, 93217, 105710, 132308, 165385, 186434, 211420, 330770, 372868, 466085, 661540, 932170, 1025387, 1864340, 2050774, 4101548, 5126935, 10253870, 20507740]

約数ペア:

[(1, 20507740), (2, 10253870), (4, 5126935), (5, 4101548), (10, 2050774), (11, 1864340), (20, 1025387), (22, 932170), (31, 661540), (44, 466085), (55, 372868), (62, 330770), (97, 211420), (110, 186434), (124, 165385), (155, 132308), (194, 105710), (220, 93217), (310, 66154), (341, 60140), (388, 52855), (485, 42284), (620, 33077), (682, 30070), (961, 21340), (970, 21142), (1067, 19220), (1364, 15035), (1705, 12028), (1922, 10670), (1940, 10571), (2134, 9610), (3007, 6820), (3410, 6014), (3844, 5335), (4268, 4805)]