20969905

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{23}}^1\times {\mathrm{137}}^1$

素因数の和:198

約数の個数: 32

約数和(自身を含む): 29092608

約数和(自身を除く): 8122703

約数列:

[1, 5, 11, 23, 55, 115, 121, 137, 253, 605, 685, 1265, 1331, 1507, 2783, 3151, 6655, 7535, 13915, 15755, 16577, 30613, 34661, 82885, 153065, 173305, 182347, 381271, 911735, 1906355, 4193981, 20969905]

約数ペア:

[(1, 20969905), (5, 4193981), (11, 1906355), (23, 911735), (55, 381271), (115, 182347), (121, 173305), (137, 153065), (253, 82885), (605, 34661), (685, 30613), (1265, 16577), (1331, 15755), (1507, 13915), (2783, 7535), (3151, 6655)]