16905020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1787}}^1$

素因数の和:1850

約数の個数: 48

約数和(自身を含む): 39650688

約数和(自身を除く): 22745668

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1787, 1892, 2365, 3574, 4730, 7148, 8935, 9460, 17870, 19657, 35740, 39314, 76841, 78628, 98285, 153682, 196570, 307364, 384205, 393140, 768410, 845251, 1536820, 1690502, 3381004, 4226255, 8452510, 16905020]

約数ペア:

[(1, 16905020), (2, 8452510), (4, 4226255), (5, 3381004), (10, 1690502), (11, 1536820), (20, 845251), (22, 768410), (43, 393140), (44, 384205), (55, 307364), (86, 196570), (110, 153682), (172, 98285), (215, 78628), (220, 76841), (430, 39314), (473, 35740), (860, 19657), (946, 17870), (1787, 9460), (1892, 8935), (2365, 7148), (3574, 4730)]