21765904

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{13469}}^1$

素因数の和:13578

約数の個数: 20

約数和(自身を含む): 42592140

約数和(自身を除く): 20826236

約数列:

[1, 2, 4, 8, 16, 101, 202, 404, 808, 1616, 13469, 26938, 53876, 107752, 215504, 1360369, 2720738, 5441476, 10882952, 21765904]

約数ペア:

[(1, 21765904), (2, 10882952), (4, 5441476), (8, 2720738), (16, 1360369), (101, 215504), (202, 107752), (404, 53876), (808, 26938), (1616, 13469)]