20624780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{389}}^1$

素因数の和:650

約数の個数: 48

約数和(自身を含む): 47567520

約数和(自身を除く): 26942740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 241, 389, 482, 778, 964, 1205, 1556, 1945, 2410, 2651, 3890, 4279, 4820, 5302, 7780, 8558, 10604, 13255, 17116, 21395, 26510, 42790, 53020, 85580, 93749, 187498, 374996, 468745, 937490, 1031239, 1874980, 2062478, 4124956, 5156195, 10312390, 20624780]

約数ペア:

[(1, 20624780), (2, 10312390), (4, 5156195), (5, 4124956), (10, 2062478), (11, 1874980), (20, 1031239), (22, 937490), (44, 468745), (55, 374996), (110, 187498), (220, 93749), (241, 85580), (389, 53020), (482, 42790), (778, 26510), (964, 21395), (1205, 17116), (1556, 13255), (1945, 10604), (2410, 8558), (2651, 7780), (3890, 5302), (4279, 4820)]