28720725

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1123}}^1$

素因数の和:1178

約数の個数: 48

約数和(自身を含む): 53520384

約数和(自身を除く): 24799659

約数列:

[1, 3, 5, 11, 15, 25, 31, 33, 55, 75, 93, 155, 165, 275, 341, 465, 775, 825, 1023, 1123, 1705, 2325, 3369, 5115, 5615, 8525, 12353, 16845, 25575, 28075, 34813, 37059, 61765, 84225, 104439, 174065, 185295, 308825, 382943, 522195, 870325, 926475, 1148829, 1914715, 2610975, 5744145, 9573575, 28720725]

約数ペア:

[(1, 28720725), (3, 9573575), (5, 5744145), (11, 2610975), (15, 1914715), (25, 1148829), (31, 926475), (33, 870325), (55, 522195), (75, 382943), (93, 308825), (155, 185295), (165, 174065), (275, 104439), (341, 84225), (465, 61765), (775, 37059), (825, 34813), (1023, 28075), (1123, 25575), (1705, 16845), (2325, 12353), (3369, 8525), (5115, 5615)]