20921824

素因数分解:

$2^5\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1213}}^1$

素因数の和:1248

約数の個数: 72

約数和(自身を含む): 52313688

約数和(自身を除く): 31391864

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 49, 56, 77, 88, 98, 112, 154, 176, 196, 224, 308, 352, 392, 539, 616, 784, 1078, 1213, 1232, 1568, 2156, 2426, 2464, 4312, 4852, 8491, 8624, 9704, 13343, 16982, 17248, 19408, 26686, 33964, 38816, 53372, 59437, 67928, 93401, 106744, 118874, 135856, 186802, 213488, 237748, 271712, 373604, 426976, 475496, 653807, 747208, 950992, 1307614, 1494416, 1901984, 2615228, 2988832, 5230456, 10460912, 20921824]

約数ペア:

[(1, 20921824), (2, 10460912), (4, 5230456), (7, 2988832), (8, 2615228), (11, 1901984), (14, 1494416), (16, 1307614), (22, 950992), (28, 747208), (32, 653807), (44, 475496), (49, 426976), (56, 373604), (77, 271712), (88, 237748), (98, 213488), (112, 186802), (154, 135856), (176, 118874), (196, 106744), (224, 93401), (308, 67928), (352, 59437), (392, 53372), (539, 38816), (616, 33964), (784, 26686), (1078, 19408), (1213, 17248), (1232, 16982), (1568, 13343), (2156, 9704), (2426, 8624), (2464, 8491), (4312, 4852)]