20421045

素因数分解:

$3^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{457}}^1$

素因数の和:802

約数の個数: 32

約数和(自身を含む): 36493440

約数和(自身を除く): 16072395

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 331, 457, 993, 1371, 1655, 2285, 2979, 4113, 4965, 6855, 8937, 12339, 14895, 20565, 44685, 61695, 151267, 453801, 756335, 1361403, 2269005, 4084209, 6807015, 20421045]

約数ペア:

[(1, 20421045), (3, 6807015), (5, 4084209), (9, 2269005), (15, 1361403), (27, 756335), (45, 453801), (135, 151267), (331, 61695), (457, 44685), (993, 20565), (1371, 14895), (1655, 12339), (2285, 8937), (2979, 6855), (4113, 4965)]