21447285

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{557}}^1$

素因数の和:733

約数の個数: 32

約数和(自身を含む): 36640512

約数和(自身を除く): 15193227

約数列:

[1, 3, 5, 15, 17, 51, 85, 151, 255, 453, 557, 755, 1671, 2265, 2567, 2785, 7701, 8355, 9469, 12835, 28407, 38505, 47345, 84107, 142035, 252321, 420535, 1261605, 1429819, 4289457, 7149095, 21447285]

約数ペア:

[(1, 21447285), (3, 7149095), (5, 4289457), (15, 1429819), (17, 1261605), (51, 420535), (85, 252321), (151, 142035), (255, 84107), (453, 47345), (557, 38505), (755, 28407), (1671, 12835), (2265, 9469), (2567, 8355), (2785, 7701)]