20495408

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:405

約数の個数: 40

約数和(自身を含む): 41143200

約数和(自身を除く): 20647792

約数列:

[1, 2, 4, 8, 16, 41, 82, 157, 164, 199, 314, 328, 398, 628, 656, 796, 1256, 1592, 2512, 3184, 6437, 8159, 12874, 16318, 25748, 31243, 32636, 51496, 62486, 65272, 102992, 124972, 130544, 249944, 499888, 1280963, 2561926, 5123852, 10247704, 20495408]

約数ペア:

[(1, 20495408), (2, 10247704), (4, 5123852), (8, 2561926), (16, 1280963), (41, 499888), (82, 249944), (157, 130544), (164, 124972), (199, 102992), (314, 65272), (328, 62486), (398, 51496), (628, 32636), (656, 31243), (796, 25748), (1256, 16318), (1592, 12874), (2512, 8159), (3184, 6437)]