19715787

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:233

約数の個数: 72

約数和(自身を含む): 37761360

約数和(自身を除く): 18045573

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 49, 57, 63, 91, 117, 133, 147, 171, 181, 247, 273, 399, 441, 543, 637, 741, 819, 931, 1197, 1267, 1629, 1729, 1911, 2223, 2353, 2793, 3439, 3801, 5187, 5733, 7059, 8379, 8869, 10317, 11403, 12103, 15561, 16471, 21177, 24073, 26607, 30951, 36309, 44707, 49413, 72219, 79821, 108927, 115297, 134121, 148239, 168511, 216657, 312949, 345891, 402363, 505533, 938847, 1037673, 1516599, 2190643, 2816541, 6571929, 19715787]

約数ペア:

[(1, 19715787), (3, 6571929), (7, 2816541), (9, 2190643), (13, 1516599), (19, 1037673), (21, 938847), (39, 505533), (49, 402363), (57, 345891), (63, 312949), (91, 216657), (117, 168511), (133, 148239), (147, 134121), (171, 115297), (181, 108927), (247, 79821), (273, 72219), (399, 49413), (441, 44707), (543, 36309), (637, 30951), (741, 26607), (819, 24073), (931, 21177), (1197, 16471), (1267, 15561), (1629, 12103), (1729, 11403), (1911, 10317), (2223, 8869), (2353, 8379), (2793, 7059), (3439, 5733), (3801, 5187)]