20806425

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 40751360

約数和(自身を除く): 19944935

約数列:

[1, 3, 5, 9, 15, 19, 25, 31, 45, 57, 75, 93, 95, 155, 157, 171, 225, 279, 285, 465, 471, 475, 589, 775, 785, 855, 1395, 1413, 1425, 1767, 2325, 2355, 2945, 2983, 3925, 4275, 4867, 5301, 6975, 7065, 8835, 8949, 11775, 14601, 14725, 14915, 24335, 26505, 26847, 35325, 43803, 44175, 44745, 73005, 74575, 92473, 121675, 132525, 134235, 219015, 223725, 277419, 365025, 462365, 671175, 832257, 1095075, 1387095, 2311825, 4161285, 6935475, 20806425]

約数ペア:

[(1, 20806425), (3, 6935475), (5, 4161285), (9, 2311825), (15, 1387095), (19, 1095075), (25, 832257), (31, 671175), (45, 462365), (57, 365025), (75, 277419), (93, 223725), (95, 219015), (155, 134235), (157, 132525), (171, 121675), (225, 92473), (279, 74575), (285, 73005), (465, 44745), (471, 44175), (475, 43803), (589, 35325), (775, 26847), (785, 26505), (855, 24335), (1395, 14915), (1413, 14725), (1425, 14601), (1767, 11775), (2325, 8949), (2355, 8835), (2945, 7065), (2983, 6975), (3925, 5301), (4275, 4867)]