21157035

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{263}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 35278848

約数和(自身を除く): 14121813

約数列:

[1, 3, 5, 15, 31, 93, 155, 173, 263, 465, 519, 789, 865, 1315, 2595, 3945, 5363, 8153, 16089, 24459, 26815, 40765, 45499, 80445, 122295, 136497, 227495, 682485, 1410469, 4231407, 7052345, 21157035]

約数ペア:

[(1, 21157035), (3, 7052345), (5, 4231407), (15, 1410469), (31, 682485), (93, 227495), (155, 136497), (173, 122295), (263, 80445), (465, 45499), (519, 40765), (789, 26815), (865, 24459), (1315, 16089), (2595, 8153), (3945, 5363)]