20899208

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 45342720

約数和(自身を除く): 24443512

約数列:

[1, 2, 4, 8, 11, 22, 31, 44, 47, 62, 88, 94, 124, 163, 188, 248, 326, 341, 376, 517, 652, 682, 1034, 1304, 1364, 1457, 1793, 2068, 2728, 2914, 3586, 4136, 5053, 5828, 7172, 7661, 10106, 11656, 14344, 15322, 16027, 20212, 30644, 32054, 40424, 55583, 61288, 64108, 84271, 111166, 128216, 168542, 222332, 237491, 337084, 444664, 474982, 674168, 949964, 1899928, 2612401, 5224802, 10449604, 20899208]

約数ペア:

[(1, 20899208), (2, 10449604), (4, 5224802), (8, 2612401), (11, 1899928), (22, 949964), (31, 674168), (44, 474982), (47, 444664), (62, 337084), (88, 237491), (94, 222332), (124, 168542), (163, 128216), (188, 111166), (248, 84271), (326, 64108), (341, 61288), (376, 55583), (517, 40424), (652, 32054), (682, 30644), (1034, 20212), (1304, 16027), (1364, 15322), (1457, 14344), (1793, 11656), (2068, 10106), (2728, 7661), (2914, 7172), (3586, 5828), (4136, 5053)]