21408465

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1087}}^1$

素因数の和:1209

約数の個数: 32

約数和(自身を含む): 37287936

約数和(自身を除く): 15879471

約数列:

[1, 3, 5, 13, 15, 39, 65, 101, 195, 303, 505, 1087, 1313, 1515, 3261, 3939, 5435, 6565, 14131, 16305, 19695, 42393, 70655, 109787, 211965, 329361, 548935, 1427231, 1646805, 4281693, 7136155, 21408465]

約数ペア:

[(1, 21408465), (3, 7136155), (5, 4281693), (13, 1646805), (15, 1427231), (39, 548935), (65, 329361), (101, 211965), (195, 109787), (303, 70655), (505, 42393), (1087, 19695), (1313, 16305), (1515, 14131), (3261, 6565), (3939, 5435)]