21316555

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{191}}^1$

素因数の和:327

約数の個数: 32

約数和(自身を含む): 29611008

約数和(自身を除く): 8294453

約数列:

[1, 5, 13, 17, 65, 85, 101, 191, 221, 505, 955, 1105, 1313, 1717, 2483, 3247, 6565, 8585, 12415, 16235, 19291, 22321, 42211, 96455, 111605, 211055, 250783, 327947, 1253915, 1639735, 4263311, 21316555]

約数ペア:

[(1, 21316555), (5, 4263311), (13, 1639735), (17, 1253915), (65, 327947), (85, 250783), (101, 211055), (191, 111605), (221, 96455), (505, 42211), (955, 22321), (1105, 19291), (1313, 16235), (1717, 12415), (2483, 8585), (3247, 6565)]