28420725

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{179}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 49550400

約数和(自身を除く): 21129675

約数列:

[1, 3, 5, 15, 25, 29, 73, 75, 87, 145, 179, 219, 365, 435, 537, 725, 895, 1095, 1825, 2117, 2175, 2685, 4475, 5191, 5475, 6351, 10585, 13067, 13425, 15573, 25955, 31755, 39201, 52925, 65335, 77865, 129775, 158775, 196005, 326675, 378943, 389325, 980025, 1136829, 1894715, 5684145, 9473575, 28420725]

約数ペア:

[(1, 28420725), (3, 9473575), (5, 5684145), (15, 1894715), (25, 1136829), (29, 980025), (73, 389325), (75, 378943), (87, 326675), (145, 196005), (179, 158775), (219, 129775), (365, 77865), (435, 65335), (537, 52925), (725, 39201), (895, 31755), (1095, 25955), (1825, 15573), (2117, 13425), (2175, 13067), (2685, 10585), (4475, 6351), (5191, 5475)]