21820695

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{353}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 37824192

約数和(自身を除く): 16003497

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 317, 353, 951, 1059, 1585, 1765, 4121, 4589, 4755, 5295, 12363, 13767, 20605, 22945, 61815, 68835, 111901, 335703, 559505, 1454713, 1678515, 4364139, 7273565, 21820695]

約数ペア:

[(1, 21820695), (3, 7273565), (5, 4364139), (13, 1678515), (15, 1454713), (39, 559505), (65, 335703), (195, 111901), (317, 68835), (353, 61815), (951, 22945), (1059, 20605), (1585, 13767), (1765, 12363), (4121, 5295), (4589, 4755)]