19878369

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{4663}}^1$

素因数の和:4709

約数の個数: 24

約数和(自身を含む): 31901760

約数和(自身を除く): 12023391

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 4663, 13989, 32641, 97923, 135227, 228487, 405681, 685461, 946589, 2839767, 6626123, 19878369]

約数ペア:

[(1, 19878369), (3, 6626123), (7, 2839767), (21, 946589), (29, 685461), (49, 405681), (87, 228487), (147, 135227), (203, 97923), (609, 32641), (1421, 13989), (4263, 4663)]