28720419

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1$

素因数の和:169

約数の個数: 64

約数和(自身を含む): 51072000

約数和(自身を除く): 22351581

約数列:

[1, 3, 7, 13, 19, 21, 39, 49, 57, 91, 113, 133, 147, 247, 273, 339, 343, 399, 637, 741, 791, 931, 1029, 1469, 1729, 1911, 2147, 2373, 2793, 4407, 4459, 5187, 5537, 6441, 6517, 10283, 12103, 13377, 15029, 16611, 19551, 27911, 30849, 36309, 38759, 45087, 71981, 83733, 84721, 105203, 116277, 195377, 215943, 254163, 315609, 503867, 586131, 736421, 1367639, 1511601, 2209263, 4102917, 9573473, 28720419]

約数ペア:

[(1, 28720419), (3, 9573473), (7, 4102917), (13, 2209263), (19, 1511601), (21, 1367639), (39, 736421), (49, 586131), (57, 503867), (91, 315609), (113, 254163), (133, 215943), (147, 195377), (247, 116277), (273, 105203), (339, 84721), (343, 83733), (399, 71981), (637, 45087), (741, 38759), (791, 36309), (931, 30849), (1029, 27911), (1469, 19551), (1729, 16611), (1911, 15029), (2147, 13377), (2373, 12103), (2793, 10283), (4407, 6517), (4459, 6441), (5187, 5537)]