28212920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{17203}}^1$

素因数の和:17255

約数の個数: 32

約数和(自身を含む): 65031120

約数和(自身を除く): 36818200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 17203, 34406, 68812, 86015, 137624, 172030, 344060, 688120, 705323, 1410646, 2821292, 3526615, 5642584, 7053230, 14106460, 28212920]

約数ペア:

[(1, 28212920), (2, 14106460), (4, 7053230), (5, 5642584), (8, 3526615), (10, 2821292), (20, 1410646), (40, 705323), (41, 688120), (82, 344060), (164, 172030), (205, 137624), (328, 86015), (410, 68812), (820, 34406), (1640, 17203)]