21736820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1117}}^1$

素因数の和:1272

約数の個数: 48

約数和(自身を含む): 52590720

約数和(自身を除く): 30853900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1117, 1390, 1946, 2234, 2780, 3892, 4468, 4865, 5585, 7819, 9730, 11170, 15638, 19460, 22340, 31276, 39095, 78190, 155263, 156380, 310526, 621052, 776315, 1086841, 1552630, 2173682, 3105260, 4347364, 5434205, 10868410, 21736820]

約数ペア:

[(1, 21736820), (2, 10868410), (4, 5434205), (5, 4347364), (7, 3105260), (10, 2173682), (14, 1552630), (20, 1086841), (28, 776315), (35, 621052), (70, 310526), (139, 156380), (140, 155263), (278, 78190), (556, 39095), (695, 31276), (973, 22340), (1117, 19460), (1390, 15638), (1946, 11170), (2234, 9730), (2780, 7819), (3892, 5585), (4468, 4865)]