21770425

素因数分解:

$5^2\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:313

約数の個数: 24

約数和(自身を含む): 27895040

約数和(自身を除く): 6124615

約数列:

[1, 5, 25, 73, 79, 151, 365, 395, 755, 1825, 1975, 3775, 5767, 11023, 11929, 28835, 55115, 59645, 144175, 275575, 298225, 870817, 4354085, 21770425]

約数ペア:

[(1, 21770425), (5, 4354085), (25, 870817), (73, 298225), (79, 275575), (151, 144175), (365, 59645), (395, 55115), (755, 28835), (1825, 11929), (1975, 11023), (3775, 5767)]