20718568

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{2729}}^1$

素因数の和:2821

約数の個数: 32

約数和(自身を含む): 42424200

約数和(自身を除く): 21705632

約数列:

[1, 2, 4, 8, 13, 26, 52, 73, 104, 146, 292, 584, 949, 1898, 2729, 3796, 5458, 7592, 10916, 21832, 35477, 70954, 141908, 199217, 283816, 398434, 796868, 1593736, 2589821, 5179642, 10359284, 20718568]

約数ペア:

[(1, 20718568), (2, 10359284), (4, 5179642), (8, 2589821), (13, 1593736), (26, 796868), (52, 398434), (73, 283816), (104, 199217), (146, 141908), (292, 70954), (584, 35477), (949, 21832), (1898, 10916), (2729, 7592), (3796, 5458)]