21561695

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{269}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 29393280

約数和(自身を除く): 7831585

約数列:

[1, 5, 17, 23, 41, 85, 115, 205, 269, 391, 697, 943, 1345, 1955, 3485, 4573, 4715, 6187, 11029, 16031, 22865, 30935, 55145, 80155, 105179, 187493, 253667, 525895, 937465, 1268335, 4312339, 21561695]

約数ペア:

[(1, 21561695), (5, 4312339), (17, 1268335), (23, 937465), (41, 525895), (85, 253667), (115, 187493), (205, 105179), (269, 80155), (391, 55145), (697, 30935), (943, 22865), (1345, 16031), (1955, 11029), (3485, 6187), (4573, 4715)]