21158440

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1723}}^1$

素因数の和:2041

約数の個数: 32

約数和(自身を含む): 47789280

約数和(自身を除く): 26630840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 1723, 2456, 3070, 3446, 6140, 6892, 8615, 12280, 13784, 17230, 34460, 68920, 528961, 1057922, 2115844, 2644805, 4231688, 5289610, 10579220, 21158440]

約数ペア:

[(1, 21158440), (2, 10579220), (4, 5289610), (5, 4231688), (8, 2644805), (10, 2115844), (20, 1057922), (40, 528961), (307, 68920), (614, 34460), (1228, 17230), (1535, 13784), (1723, 12280), (2456, 8615), (3070, 6892), (3446, 6140)]