1389640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{709}}^1$

素因数の和:734

約数の個数: 48

約数和(自身を含む): 3642300

約数和(自身を除く): 2252660

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 709, 980, 1418, 1960, 2836, 3545, 4963, 5672, 7090, 9926, 14180, 19852, 24815, 28360, 34741, 39704, 49630, 69482, 99260, 138964, 173705, 198520, 277928, 347410, 694820, 1389640]

約数ペア:

[(1, 1389640), (2, 694820), (4, 347410), (5, 277928), (7, 198520), (8, 173705), (10, 138964), (14, 99260), (20, 69482), (28, 49630), (35, 39704), (40, 34741), (49, 28360), (56, 24815), (70, 19852), (98, 14180), (140, 9926), (196, 7090), (245, 5672), (280, 4963), (392, 3545), (490, 2836), (709, 1960), (980, 1418)]