20984120

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30859}}^1$

素因数の和:30887

約数の個数: 32

約数和(自身を含む): 49993200

約数和(自身を除く): 29009080

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30859, 61718, 123436, 154295, 246872, 308590, 524603, 617180, 1049206, 1234360, 2098412, 2623015, 4196824, 5246030, 10492060, 20984120]

約数ペア:

[(1, 20984120), (2, 10492060), (4, 5246030), (5, 4196824), (8, 2623015), (10, 2098412), (17, 1234360), (20, 1049206), (34, 617180), (40, 524603), (68, 308590), (85, 246872), (136, 154295), (170, 123436), (340, 61718), (680, 30859)]