20808180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{115601}}^1$

素因数の和:115616

約数の個数: 36

約数和(自身を含む): 63118692

約数和(自身を除く): 42310512

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 115601, 231202, 346803, 462404, 578005, 693606, 1040409, 1156010, 1387212, 1734015, 2080818, 2312020, 3468030, 4161636, 5202045, 6936060, 10404090, 20808180]

約数ペア:

[(1, 20808180), (2, 10404090), (3, 6936060), (4, 5202045), (5, 4161636), (6, 3468030), (9, 2312020), (10, 2080818), (12, 1734015), (15, 1387212), (18, 1156010), (20, 1040409), (30, 693606), (36, 578005), (45, 462404), (60, 346803), (90, 231202), (180, 115601)]