1389691720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{847373}}^1$

素因数の和:847425

約数の個数: 32

約数和(自身を含む): 3203073720

約数和(自身を除く): 1813382000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 847373, 1694746, 3389492, 4236865, 6778984, 8473730, 16947460, 33894920, 34742293, 69484586, 138969172, 173711465, 277938344, 347422930, 694845860, 1389691720]

約数ペア:

[(1, 1389691720), (2, 694845860), (4, 347422930), (5, 277938344), (8, 173711465), (10, 138969172), (20, 69484586), (40, 34742293), (41, 33894920), (82, 16947460), (164, 8473730), (205, 6778984), (328, 4236865), (410, 3389492), (820, 1694746), (1640, 847373)]