21291872

素因数分解:

$2^5\times 7^2\times {\mathrm{37}}^1\times {\mathrm{367}}^1$

素因数の和:428

約数の個数: 72

約数和(自身を含む): 50216544

約数和(自身を除く): 28924672

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 37, 49, 56, 74, 98, 112, 148, 196, 224, 259, 296, 367, 392, 518, 592, 734, 784, 1036, 1184, 1468, 1568, 1813, 2072, 2569, 2936, 3626, 4144, 5138, 5872, 7252, 8288, 10276, 11744, 13579, 14504, 17983, 20552, 27158, 29008, 35966, 41104, 54316, 58016, 71932, 82208, 95053, 108632, 143864, 190106, 217264, 287728, 380212, 434528, 575456, 665371, 760424, 1330742, 1520848, 2661484, 3041696, 5322968, 10645936, 21291872]

約数ペア:

[(1, 21291872), (2, 10645936), (4, 5322968), (7, 3041696), (8, 2661484), (14, 1520848), (16, 1330742), (28, 760424), (32, 665371), (37, 575456), (49, 434528), (56, 380212), (74, 287728), (98, 217264), (112, 190106), (148, 143864), (196, 108632), (224, 95053), (259, 82208), (296, 71932), (367, 58016), (392, 54316), (518, 41104), (592, 35966), (734, 29008), (784, 27158), (1036, 20552), (1184, 17983), (1468, 14504), (1568, 13579), (1813, 11744), (2072, 10276), (2569, 8288), (2936, 7252), (3626, 5872), (4144, 5138)]