87090020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{61331}}^1$

素因数の和:61411

約数の個数: 24

約数和(自身を含む): 185467968

約数和(自身を除く): 98377948

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 61331, 122662, 245324, 306655, 613310, 1226620, 4354501, 8709002, 17418004, 21772505, 43545010, 87090020]

約数ペア:

[(1, 87090020), (2, 43545010), (4, 21772505), (5, 17418004), (10, 8709002), (20, 4354501), (71, 1226620), (142, 613310), (284, 306655), (355, 245324), (710, 122662), (1420, 61331)]