20902720

素因数分解:

$2^6\times 5^1\times {\mathrm{83}}^1\times {\mathrm{787}}^1$

素因数の和:887

約数の個数: 56

約数和(自身を含む): 50438304

約数和(自身を除く): 29535584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 83, 160, 166, 320, 332, 415, 664, 787, 830, 1328, 1574, 1660, 2656, 3148, 3320, 3935, 5312, 6296, 6640, 7870, 12592, 13280, 15740, 25184, 26560, 31480, 50368, 62960, 65321, 125920, 130642, 251840, 261284, 326605, 522568, 653210, 1045136, 1306420, 2090272, 2612840, 4180544, 5225680, 10451360, 20902720]

約数ペア:

[(1, 20902720), (2, 10451360), (4, 5225680), (5, 4180544), (8, 2612840), (10, 2090272), (16, 1306420), (20, 1045136), (32, 653210), (40, 522568), (64, 326605), (80, 261284), (83, 251840), (160, 130642), (166, 125920), (320, 65321), (332, 62960), (415, 50368), (664, 31480), (787, 26560), (830, 25184), (1328, 15740), (1574, 13280), (1660, 12592), (2656, 7870), (3148, 6640), (3320, 6296), (3935, 5312)]