20280400

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{7243}}^1$

素因数の和:7268

約数の個数: 60

約数和(自身を含む): 55691872

約数和(自身を除く): 35411472

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 50, 56, 70, 80, 100, 112, 140, 175, 200, 280, 350, 400, 560, 700, 1400, 2800, 7243, 14486, 28972, 36215, 50701, 57944, 72430, 101402, 115888, 144860, 181075, 202804, 253505, 289720, 362150, 405608, 507010, 579440, 724300, 811216, 1014020, 1267525, 1448600, 2028040, 2535050, 2897200, 4056080, 5070100, 10140200, 20280400]

約数ペア:

[(1, 20280400), (2, 10140200), (4, 5070100), (5, 4056080), (7, 2897200), (8, 2535050), (10, 2028040), (14, 1448600), (16, 1267525), (20, 1014020), (25, 811216), (28, 724300), (35, 579440), (40, 507010), (50, 405608), (56, 362150), (70, 289720), (80, 253505), (100, 202804), (112, 181075), (140, 144860), (175, 115888), (200, 101402), (280, 72430), (350, 57944), (400, 50701), (560, 36215), (700, 28972), (1400, 14486), (2800, 7243)]