21697215

素因数分解:

$3^1\times 5^1\times {\mathrm{607}}^1\times {\mathrm{2383}}^1$

素因数の和:2998

約数の個数: 16

約数和(自身を含む): 34787328

約数和(自身を除く): 13090113

約数列:

[1, 3, 5, 15, 607, 1821, 2383, 3035, 7149, 9105, 11915, 35745, 1446481, 4339443, 7232405, 21697215]

約数ペア:

[(1, 21697215), (3, 7232405), (5, 4339443), (15, 1446481), (607, 35745), (1821, 11915), (2383, 9105), (3035, 7149)]