20651920

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{6977}}^1$

素因数の和:7027

約数の個数: 40

約数和(自身を含む): 49320504

約数和(自身を除く): 28668584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 6977, 13954, 27908, 34885, 55816, 69770, 111632, 139540, 258149, 279080, 516298, 558160, 1032596, 1290745, 2065192, 2581490, 4130384, 5162980, 10325960, 20651920]

約数ペア:

[(1, 20651920), (2, 10325960), (4, 5162980), (5, 4130384), (8, 2581490), (10, 2065192), (16, 1290745), (20, 1032596), (37, 558160), (40, 516298), (74, 279080), (80, 258149), (148, 139540), (185, 111632), (296, 69770), (370, 55816), (592, 34885), (740, 27908), (1480, 13954), (2960, 6977)]