181319920

素因数分解:

$2^4\times 5^1\times {\mathrm{2266499}}^1$

素因数の和:2266512

約数の個数: 20

約数和(自身を含む): 421569000

約数和(自身を除く): 240249080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2266499, 4532998, 9065996, 11332495, 18131992, 22664990, 36263984, 45329980, 90659960, 181319920]

約数ペア:

[(1, 181319920), (2, 90659960), (4, 45329980), (5, 36263984), (8, 22664990), (10, 18131992), (16, 11332495), (20, 9065996), (40, 4532998), (80, 2266499)]