20496520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1259}}^1$

素因数の和:1318

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 31213880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1259, 1480, 1628, 2035, 2518, 3256, 4070, 5036, 6295, 8140, 10072, 12590, 13849, 16280, 25180, 27698, 46583, 50360, 55396, 69245, 93166, 110792, 138490, 186332, 232915, 276980, 372664, 465830, 512413, 553960, 931660, 1024826, 1863320, 2049652, 2562065, 4099304, 5124130, 10248260, 20496520]

約数ペア:

[(1, 20496520), (2, 10248260), (4, 5124130), (5, 4099304), (8, 2562065), (10, 2049652), (11, 1863320), (20, 1024826), (22, 931660), (37, 553960), (40, 512413), (44, 465830), (55, 372664), (74, 276980), (88, 232915), (110, 186332), (148, 138490), (185, 110792), (220, 93166), (296, 69245), (370, 55396), (407, 50360), (440, 46583), (740, 27698), (814, 25180), (1259, 16280), (1480, 13849), (1628, 12590), (2035, 10072), (2518, 8140), (3256, 6295), (4070, 5036)]