20287760

素因数分解:

$2^4\times 5^1\times {\mathrm{367}}^1\times {\mathrm{691}}^1$

素因数の和:1071

約数の個数: 40

約数和(自身を含む): 47366016

約数和(自身を除く): 27078256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 367, 691, 734, 1382, 1468, 1835, 2764, 2936, 3455, 3670, 5528, 5872, 6910, 7340, 11056, 13820, 14680, 27640, 29360, 55280, 253597, 507194, 1014388, 1267985, 2028776, 2535970, 4057552, 5071940, 10143880, 20287760]

約数ペア:

[(1, 20287760), (2, 10143880), (4, 5071940), (5, 4057552), (8, 2535970), (10, 2028776), (16, 1267985), (20, 1014388), (40, 507194), (80, 253597), (367, 55280), (691, 29360), (734, 27640), (1382, 14680), (1468, 13820), (1835, 11056), (2764, 7340), (2936, 6910), (3455, 5872), (3670, 5528)]