21464380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1103}}^1$

素因数の和:1258

約数の個数: 48

約数和(自身を含む): 51932160

約数和(自身を除く): 30467780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1103, 1390, 1946, 2206, 2780, 3892, 4412, 4865, 5515, 7721, 9730, 11030, 15442, 19460, 22060, 30884, 38605, 77210, 153317, 154420, 306634, 613268, 766585, 1073219, 1533170, 2146438, 3066340, 4292876, 5366095, 10732190, 21464380]

約数ペア:

[(1, 21464380), (2, 10732190), (4, 5366095), (5, 4292876), (7, 3066340), (10, 2146438), (14, 1533170), (20, 1073219), (28, 766585), (35, 613268), (70, 306634), (139, 154420), (140, 153317), (278, 77210), (556, 38605), (695, 30884), (973, 22060), (1103, 19460), (1390, 15442), (1946, 11030), (2206, 9730), (2780, 7721), (3892, 5515), (4412, 4865)]