21484515

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6481}}^1$

素因数の和:6519

約数の個数: 32

約数和(自身を含む): 39203136

約数和(自身を除く): 17718621

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6481, 19443, 32405, 84253, 97215, 110177, 252759, 330531, 421265, 550885, 1263795, 1432301, 1652655, 4296903, 7161505, 21484515]

約数ペア:

[(1, 21484515), (3, 7161505), (5, 4296903), (13, 1652655), (15, 1432301), (17, 1263795), (39, 550885), (51, 421265), (65, 330531), (85, 252759), (195, 110177), (221, 97215), (255, 84253), (663, 32405), (1105, 19443), (3315, 6481)]