28419880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{10007}}^1$

素因数の和:10089

約数の個数: 32

約数和(自身を含む): 64851840

約数和(自身を除く): 36431960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 10007, 20014, 40028, 50035, 80056, 100070, 200140, 400280, 710497, 1420994, 2841988, 3552485, 5683976, 7104970, 14209940, 28419880]

約数ペア:

[(1, 28419880), (2, 14209940), (4, 7104970), (5, 5683976), (8, 3552485), (10, 2841988), (20, 1420994), (40, 710497), (71, 400280), (142, 200140), (284, 100070), (355, 80056), (568, 50035), (710, 40028), (1420, 20014), (2840, 10007)]