21518189

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 28148736

約数和(自身を除く): 6630547

約数列:

[1, 7, 11, 43, 67, 77, 97, 301, 469, 473, 679, 737, 1067, 2881, 3311, 4171, 5159, 6499, 7469, 20167, 29197, 31691, 45493, 45881, 71489, 221837, 279457, 321167, 500423, 1956199, 3074027, 21518189]

約数ペア:

[(1, 21518189), (7, 3074027), (11, 1956199), (43, 500423), (67, 321167), (77, 279457), (97, 221837), (301, 71489), (469, 45881), (473, 45493), (679, 31691), (737, 29197), (1067, 20167), (2881, 7469), (3311, 6499), (4171, 5159)]