18902972

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 37669632

約数和(自身を除く): 18766660

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 97, 103, 172, 194, 206, 388, 412, 473, 946, 1067, 1133, 1892, 2134, 2266, 4171, 4268, 4429, 4532, 8342, 8858, 9991, 16684, 17716, 19982, 39964, 45881, 48719, 91762, 97438, 109901, 183524, 194876, 219802, 429613, 439604, 859226, 1718452, 4725743, 9451486, 18902972]

約数ペア:

[(1, 18902972), (2, 9451486), (4, 4725743), (11, 1718452), (22, 859226), (43, 439604), (44, 429613), (86, 219802), (97, 194876), (103, 183524), (172, 109901), (194, 97438), (206, 91762), (388, 48719), (412, 45881), (473, 39964), (946, 19982), (1067, 17716), (1133, 16684), (1892, 9991), (2134, 8858), (2266, 8342), (4171, 4532), (4268, 4429)]