21478515

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{27017}}^1$

素因数の和:27078

約数の個数: 16

約数和(自身を含む): 35015328

約数和(自身を除く): 13536813

約数列:

[1, 3, 5, 15, 53, 159, 265, 795, 27017, 81051, 135085, 405255, 1431901, 4295703, 7159505, 21478515]

約数ペア:

[(1, 21478515), (3, 7159505), (5, 4295703), (15, 1431901), (53, 405255), (159, 135085), (265, 81051), (795, 27017)]