21995655

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{1223}}^1$

素因数の和:1351

約数の個数: 32

約数和(自身を含む): 38776320

約数和(自身を除く): 16780665

約数列:

[1, 3, 5, 11, 15, 33, 55, 109, 165, 327, 545, 1199, 1223, 1635, 3597, 3669, 5995, 6115, 13453, 17985, 18345, 40359, 67265, 133307, 201795, 399921, 666535, 1466377, 1999605, 4399131, 7331885, 21995655]

約数ペア:

[(1, 21995655), (3, 7331885), (5, 4399131), (11, 1999605), (15, 1466377), (33, 666535), (55, 399921), (109, 201795), (165, 133307), (327, 67265), (545, 40359), (1199, 18345), (1223, 17985), (1635, 13453), (3597, 6115), (3669, 5995)]