21393295

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{307}}^1$

素因数の和:511

約数の個数: 32

約数和(自身を含む): 32288256

約数和(自身を除く): 10894961

約数列:

[1, 5, 7, 11, 35, 55, 77, 181, 307, 385, 905, 1267, 1535, 1991, 2149, 3377, 6335, 9955, 10745, 13937, 16885, 23639, 55567, 69685, 118195, 277835, 388969, 611237, 1944845, 3056185, 4278659, 21393295]

約数ペア:

[(1, 21393295), (5, 4278659), (7, 3056185), (11, 1944845), (35, 611237), (55, 388969), (77, 277835), (181, 118195), (307, 69685), (385, 55567), (905, 23639), (1267, 16885), (1535, 13937), (1991, 10745), (2149, 9955), (3377, 6335)]