21252399

素因数分解:

$3^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 12132561

約数列:

[1, 3, 7, 21, 83, 89, 137, 249, 267, 411, 581, 623, 959, 1743, 1869, 2877, 7387, 11371, 12193, 22161, 34113, 36579, 51709, 79597, 85351, 155127, 238791, 256053, 1012019, 3036057, 7084133, 21252399]

約数ペア:

[(1, 21252399), (3, 7084133), (7, 3036057), (21, 1012019), (83, 256053), (89, 238791), (137, 155127), (249, 85351), (267, 79597), (411, 51709), (581, 36579), (623, 34113), (959, 22161), (1743, 12193), (1869, 11371), (2877, 7387)]