81702980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131779}}^1$

素因数の和:131819

約数の個数: 24

約数和(自身を含む): 177112320

約数和(自身を除く): 95409340

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131779, 263558, 527116, 658895, 1317790, 2635580, 4085149, 8170298, 16340596, 20425745, 40851490, 81702980]

約数ペア:

[(1, 81702980), (2, 40851490), (4, 20425745), (5, 16340596), (10, 8170298), (20, 4085149), (31, 2635580), (62, 1317790), (124, 658895), (155, 527116), (310, 263558), (620, 131779)]