18686540

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{12799}}^1$

素因数の和:12881

約数の個数: 24

約数和(自身を含む): 39782400

約数和(自身を除く): 21095860

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 12799, 25598, 51196, 63995, 127990, 255980, 934327, 1868654, 3737308, 4671635, 9343270, 18686540]

約数ペア:

[(1, 18686540), (2, 9343270), (4, 4671635), (5, 3737308), (10, 1868654), (20, 934327), (73, 255980), (146, 127990), (292, 63995), (365, 51196), (730, 25598), (1460, 12799)]