81820221

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1\times {\mathrm{331}}^1$

素因数の和:569

約数の個数: 32

約数和(自身を含む): 127488000

約数和(自身を除く): 45667779

約数列:

[1, 3, 7, 21, 79, 149, 237, 331, 447, 553, 993, 1043, 1659, 2317, 3129, 6951, 11771, 26149, 35313, 49319, 78447, 82397, 147957, 183043, 247191, 345233, 549129, 1035699, 3896201, 11688603, 27273407, 81820221]

約数ペア:

[(1, 81820221), (3, 27273407), (7, 11688603), (21, 3896201), (79, 1035699), (149, 549129), (237, 345233), (331, 247191), (447, 183043), (553, 147957), (993, 82397), (1043, 78447), (1659, 49319), (2317, 35313), (3129, 26149), (6951, 11771)]