21460815

素因数分解:

$3^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2239}}^1$

素因数の和:2324

約数の個数: 32

約数和(自身を含む): 38707200

約数和(自身を除く): 17246385

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 135, 213, 355, 639, 1065, 1917, 2239, 3195, 6717, 9585, 11195, 20151, 33585, 60453, 100755, 158969, 302265, 476907, 794845, 1430721, 2384535, 4292163, 7153605, 21460815]

約数ペア:

[(1, 21460815), (3, 7153605), (5, 4292163), (9, 2384535), (15, 1430721), (27, 794845), (45, 476907), (71, 302265), (135, 158969), (213, 100755), (355, 60453), (639, 33585), (1065, 20151), (1917, 11195), (2239, 9585), (3195, 6717)]