21531965

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1279}}^1$

素因数の和:1341

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 11154115

約数列:

[1, 5, 7, 13, 35, 37, 65, 91, 185, 259, 455, 481, 1279, 1295, 2405, 3367, 6395, 8953, 16627, 16835, 44765, 47323, 83135, 116389, 236615, 331261, 581945, 615199, 1656305, 3075995, 4306393, 21531965]

約数ペア:

[(1, 21531965), (5, 4306393), (7, 3075995), (13, 1656305), (35, 615199), (37, 581945), (65, 331261), (91, 236615), (185, 116389), (259, 83135), (455, 47323), (481, 44765), (1279, 16835), (1295, 16627), (2405, 8953), (3367, 6395)]