21737720

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1297}}^1$

素因数の和:1727

約数の個数: 32

約数和(自身を含む): 49064400

約数和(自身を除く): 27326680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1297, 1676, 2095, 2594, 3352, 4190, 5188, 6485, 8380, 10376, 12970, 16760, 25940, 51880, 543443, 1086886, 2173772, 2717215, 4347544, 5434430, 10868860, 21737720]

約数ペア:

[(1, 21737720), (2, 10868860), (4, 5434430), (5, 4347544), (8, 2717215), (10, 2173772), (20, 1086886), (40, 543443), (419, 51880), (838, 25940), (1297, 16760), (1676, 12970), (2095, 10376), (2594, 8380), (3352, 6485), (4190, 5188)]