20448560

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1223}}^1$

素因数の和:1266

約数の個数: 80

約数和(自身を含む): 54639360

約数和(自身を除く): 34190800

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1223, 1520, 1672, 2090, 2446, 3344, 4180, 4892, 6115, 8360, 9784, 12230, 13453, 16720, 19568, 23237, 24460, 26906, 46474, 48920, 53812, 67265, 92948, 97840, 107624, 116185, 134530, 185896, 215248, 232370, 255607, 269060, 371792, 464740, 511214, 538120, 929480, 1022428, 1076240, 1278035, 1858960, 2044856, 2556070, 4089712, 5112140, 10224280, 20448560]

約数ペア:

[(1, 20448560), (2, 10224280), (4, 5112140), (5, 4089712), (8, 2556070), (10, 2044856), (11, 1858960), (16, 1278035), (19, 1076240), (20, 1022428), (22, 929480), (38, 538120), (40, 511214), (44, 464740), (55, 371792), (76, 269060), (80, 255607), (88, 232370), (95, 215248), (110, 185896), (152, 134530), (176, 116185), (190, 107624), (209, 97840), (220, 92948), (304, 67265), (380, 53812), (418, 48920), (440, 46474), (760, 26906), (836, 24460), (880, 23237), (1045, 19568), (1223, 16720), (1520, 13453), (1672, 12230), (2090, 9784), (2446, 8360), (3344, 6115), (4180, 4892)]