20481872

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{293}}^1$

素因数の和:575

約数の個数: 40

約数和(自身を含む): 42325416

約数和(自身を除く): 21843544

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 257, 272, 293, 514, 586, 1028, 1172, 2056, 2344, 4112, 4369, 4688, 4981, 8738, 9962, 17476, 19924, 34952, 39848, 69904, 75301, 79696, 150602, 301204, 602408, 1204816, 1280117, 2560234, 5120468, 10240936, 20481872]

約数ペア:

[(1, 20481872), (2, 10240936), (4, 5120468), (8, 2560234), (16, 1280117), (17, 1204816), (34, 602408), (68, 301204), (136, 150602), (257, 79696), (272, 75301), (293, 69904), (514, 39848), (586, 34952), (1028, 19924), (1172, 17476), (2056, 9962), (2344, 8738), (4112, 4981), (4369, 4688)]