21489440

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2741}}^1$

素因数の和:2770

約数の個数: 72

約数和(自身を含む): 59079132

約数和(自身を除く): 37589692

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2741, 3920, 5482, 7840, 10964, 13705, 19187, 21928, 27410, 38374, 43856, 54820, 76748, 87712, 95935, 109640, 134309, 153496, 191870, 219280, 268618, 306992, 383740, 438560, 537236, 613984, 671545, 767480, 1074472, 1343090, 1534960, 2148944, 2686180, 3069920, 4297888, 5372360, 10744720, 21489440]

約数ペア:

[(1, 21489440), (2, 10744720), (4, 5372360), (5, 4297888), (7, 3069920), (8, 2686180), (10, 2148944), (14, 1534960), (16, 1343090), (20, 1074472), (28, 767480), (32, 671545), (35, 613984), (40, 537236), (49, 438560), (56, 383740), (70, 306992), (80, 268618), (98, 219280), (112, 191870), (140, 153496), (160, 134309), (196, 109640), (224, 95935), (245, 87712), (280, 76748), (392, 54820), (490, 43856), (560, 38374), (784, 27410), (980, 21928), (1120, 19187), (1568, 13705), (1960, 10964), (2741, 7840), (3920, 5482)]