20161620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1109}}^1$

素因数の和:1225

約数の個数: 72

約数和(自身を含む): 61818120

約数和(自身を除く): 41656500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 101, 180, 202, 303, 404, 505, 606, 909, 1010, 1109, 1212, 1515, 1818, 2020, 2218, 3030, 3327, 3636, 4436, 4545, 5545, 6060, 6654, 9090, 9981, 11090, 13308, 16635, 18180, 19962, 22180, 33270, 39924, 49905, 66540, 99810, 112009, 199620, 224018, 336027, 448036, 560045, 672054, 1008081, 1120090, 1344108, 1680135, 2016162, 2240180, 3360270, 4032324, 5040405, 6720540, 10080810, 20161620]

約数ペア:

[(1, 20161620), (2, 10080810), (3, 6720540), (4, 5040405), (5, 4032324), (6, 3360270), (9, 2240180), (10, 2016162), (12, 1680135), (15, 1344108), (18, 1120090), (20, 1008081), (30, 672054), (36, 560045), (45, 448036), (60, 336027), (90, 224018), (101, 199620), (180, 112009), (202, 99810), (303, 66540), (404, 49905), (505, 39924), (606, 33270), (909, 22180), (1010, 19962), (1109, 18180), (1212, 16635), (1515, 13308), (1818, 11090), (2020, 9981), (2218, 9090), (3030, 6654), (3327, 6060), (3636, 5545), (4436, 4545)]