21381295

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 28957824

約数和(自身を除く): 7576529

約数列:

[1, 5, 13, 41, 65, 71, 113, 205, 355, 533, 565, 923, 1469, 2665, 2911, 4615, 4633, 7345, 8023, 14555, 23165, 37843, 40115, 60229, 104299, 189215, 301145, 328943, 521495, 1644715, 4276259, 21381295]

約数ペア:

[(1, 21381295), (5, 4276259), (13, 1644715), (41, 521495), (65, 328943), (71, 301145), (113, 189215), (205, 104299), (355, 60229), (533, 40115), (565, 37843), (923, 23165), (1469, 14555), (2665, 8023), (2911, 7345), (4615, 4633)]