18563980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{22639}}^1$

素因数の和:22689

約数の個数: 24

約数和(自身を含む): 39936960

約数和(自身を除く): 21372980

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 22639, 45278, 90556, 113195, 226390, 452780, 928199, 1856398, 3712796, 4640995, 9281990, 18563980]

約数ペア:

[(1, 18563980), (2, 9281990), (4, 4640995), (5, 3712796), (10, 1856398), (20, 928199), (41, 452780), (82, 226390), (164, 113195), (205, 90556), (410, 45278), (820, 22639)]