221540680

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{21059}}^1$

素因数の和:21333

約数の個数: 32

約数和(自身を含む): 500385600

約数和(自身を除く): 278844920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2104, 2630, 5260, 10520, 21059, 42118, 84236, 105295, 168472, 210590, 421180, 842360, 5538517, 11077034, 22154068, 27692585, 44308136, 55385170, 110770340, 221540680]

約数ペア:

[(1, 221540680), (2, 110770340), (4, 55385170), (5, 44308136), (8, 27692585), (10, 22154068), (20, 11077034), (40, 5538517), (263, 842360), (526, 421180), (1052, 210590), (1315, 168472), (2104, 105295), (2630, 84236), (5260, 42118), (10520, 21059)]