21462385

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{151}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 30818304

約数和(自身を除く): 9355919

約数列:

[1, 5, 7, 31, 35, 131, 151, 155, 217, 655, 755, 917, 1057, 1085, 4061, 4585, 4681, 5285, 19781, 20305, 23405, 28427, 32767, 98905, 138467, 142135, 163835, 613211, 692335, 3066055, 4292477, 21462385]

約数ペア:

[(1, 21462385), (5, 4292477), (7, 3066055), (31, 692335), (35, 613211), (131, 163835), (151, 142135), (155, 138467), (217, 98905), (655, 32767), (755, 28427), (917, 23405), (1057, 20305), (1085, 19781), (4061, 5285), (4585, 4681)]