21131691

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{4957}}^1$

素因数の和:5003

約数の個数: 24

約数和(自身を含む): 33912720

約数和(自身を除く): 12781029

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 4957, 14871, 34699, 104097, 143753, 242893, 431259, 728679, 1006271, 3018813, 7043897, 21131691]

約数ペア:

[(1, 21131691), (3, 7043897), (7, 3018813), (21, 1006271), (29, 728679), (49, 431259), (87, 242893), (147, 143753), (203, 104097), (609, 34699), (1421, 14871), (4263, 4957)]