21718280

素因数分解:

$2^3\times 5^1\times {\mathrm{577}}^1\times {\mathrm{941}}^1$

素因数の和:1529

約数の個数: 32

約数和(自身を含む): 49002840

約数和(自身を除く): 27284560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 577, 941, 1154, 1882, 2308, 2885, 3764, 4616, 4705, 5770, 7528, 9410, 11540, 18820, 23080, 37640, 542957, 1085914, 2171828, 2714785, 4343656, 5429570, 10859140, 21718280]

約数ペア:

[(1, 21718280), (2, 10859140), (4, 5429570), (5, 4343656), (8, 2714785), (10, 2171828), (20, 1085914), (40, 542957), (577, 37640), (941, 23080), (1154, 18820), (1882, 11540), (2308, 9410), (2885, 7528), (3764, 5770), (4616, 4705)]