20991040

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{9371}}^1$

素因数の和:9395

約数の個数: 56

約数和(自身を含む): 57131712

約数和(自身を除く): 36140672

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 140, 160, 224, 280, 320, 448, 560, 1120, 2240, 9371, 18742, 37484, 46855, 65597, 74968, 93710, 131194, 149936, 187420, 262388, 299872, 327985, 374840, 524776, 599744, 655970, 749680, 1049552, 1311940, 1499360, 2099104, 2623880, 2998720, 4198208, 5247760, 10495520, 20991040]

約数ペア:

[(1, 20991040), (2, 10495520), (4, 5247760), (5, 4198208), (7, 2998720), (8, 2623880), (10, 2099104), (14, 1499360), (16, 1311940), (20, 1049552), (28, 749680), (32, 655970), (35, 599744), (40, 524776), (56, 374840), (64, 327985), (70, 299872), (80, 262388), (112, 187420), (140, 149936), (160, 131194), (224, 93710), (280, 74968), (320, 65597), (448, 46855), (560, 37484), (1120, 18742), (2240, 9371)]