21232215

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{1307}}^1$

素因数の和:1356

約数の個数: 36

約数和(自身を含む): 38871144

約数和(自身を除く): 17638929

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 361, 855, 1083, 1307, 1805, 3249, 3921, 5415, 6535, 11763, 16245, 19605, 24833, 58815, 74499, 124165, 223497, 372495, 471827, 1117485, 1415481, 2359135, 4246443, 7077405, 21232215]

約数ペア:

[(1, 21232215), (3, 7077405), (5, 4246443), (9, 2359135), (15, 1415481), (19, 1117485), (45, 471827), (57, 372495), (95, 223497), (171, 124165), (285, 74499), (361, 58815), (855, 24833), (1083, 19605), (1307, 16245), (1805, 11763), (3249, 6535), (3921, 5415)]