28920775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 41622336

約数和(自身を除く): 12701561

約数列:

[1, 5, 13, 23, 25, 53, 65, 73, 115, 265, 299, 325, 365, 575, 689, 949, 1219, 1325, 1495, 1679, 1825, 3445, 3869, 4745, 6095, 7475, 8395, 15847, 17225, 19345, 21827, 23725, 30475, 41975, 50297, 79235, 88987, 96725, 109135, 251485, 396175, 444935, 545675, 1156831, 1257425, 2224675, 5784155, 28920775]

約数ペア:

[(1, 28920775), (5, 5784155), (13, 2224675), (23, 1257425), (25, 1156831), (53, 545675), (65, 444935), (73, 396175), (115, 251485), (265, 109135), (299, 96725), (325, 88987), (365, 79235), (575, 50297), (689, 41975), (949, 30475), (1219, 23725), (1325, 21827), (1495, 19345), (1679, 17225), (1825, 15847), (3445, 8395), (3869, 7475), (4745, 6095)]