20916216

素因数分解:

$2^3\times 3^2\times {\mathrm{449}}^1\times {\mathrm{647}}^1$

素因数の和:1108

約数の個数: 48

約数和(自身を含む): 56862000

約数和(自身を除く): 35945784

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 449, 647, 898, 1294, 1347, 1796, 1941, 2588, 2694, 3592, 3882, 4041, 5176, 5388, 5823, 7764, 8082, 10776, 11646, 15528, 16164, 23292, 32328, 46584, 290503, 581006, 871509, 1162012, 1743018, 2324024, 2614527, 3486036, 5229054, 6972072, 10458108, 20916216]

約数ペア:

[(1, 20916216), (2, 10458108), (3, 6972072), (4, 5229054), (6, 3486036), (8, 2614527), (9, 2324024), (12, 1743018), (18, 1162012), (24, 871509), (36, 581006), (72, 290503), (449, 46584), (647, 32328), (898, 23292), (1294, 16164), (1347, 15528), (1796, 11646), (1941, 10776), (2588, 8082), (2694, 7764), (3592, 5823), (3882, 5388), (4041, 5176)]