21341385

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^2$

素因数の和:406

約数の個数: 36

約数和(自身を含む): 40046916

約数和(自身を除く): 18705531

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 191, 195, 573, 585, 955, 1719, 2483, 2865, 7449, 8595, 12415, 22347, 36481, 37245, 109443, 111735, 182405, 328329, 474253, 547215, 1422759, 1641645, 2371265, 4268277, 7113795, 21341385]

約数ペア:

[(1, 21341385), (3, 7113795), (5, 4268277), (9, 2371265), (13, 1641645), (15, 1422759), (39, 547215), (45, 474253), (65, 328329), (117, 182405), (191, 111735), (195, 109443), (573, 37245), (585, 36481), (955, 22347), (1719, 12415), (2483, 8595), (2865, 7449)]