21203865

素因数分解:

$3^2\times 5^1\times {\mathrm{191}}^1\times {\mathrm{2467}}^1$

素因数の和:2669

約数の個数: 24

約数和(自身を含む): 36960768

約数和(自身を除く): 15756903

約数列:

[1, 3, 5, 9, 15, 45, 191, 573, 955, 1719, 2467, 2865, 7401, 8595, 12335, 22203, 37005, 111015, 471197, 1413591, 2355985, 4240773, 7067955, 21203865]

約数ペア:

[(1, 21203865), (3, 7067955), (5, 4240773), (9, 2355985), (15, 1413591), (45, 471197), (191, 111015), (573, 37005), (955, 22203), (1719, 12335), (2467, 8595), (2865, 7401)]