20691972

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{523}}^1$

素因数の和:697

約数の個数: 72

約数和(自身を含む): 60272576

約数和(自身を除く): 39580604

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 157, 252, 314, 471, 523, 628, 942, 1046, 1099, 1413, 1569, 1884, 2092, 2198, 2826, 3138, 3297, 3661, 4396, 4707, 5652, 6276, 6594, 7322, 9414, 9891, 10983, 13188, 14644, 18828, 19782, 21966, 32949, 39564, 43932, 65898, 82111, 131796, 164222, 246333, 328444, 492666, 574777, 738999, 985332, 1149554, 1477998, 1724331, 2299108, 2955996, 3448662, 5172993, 6897324, 10345986, 20691972]

約数ペア:

[(1, 20691972), (2, 10345986), (3, 6897324), (4, 5172993), (6, 3448662), (7, 2955996), (9, 2299108), (12, 1724331), (14, 1477998), (18, 1149554), (21, 985332), (28, 738999), (36, 574777), (42, 492666), (63, 328444), (84, 246333), (126, 164222), (157, 131796), (252, 82111), (314, 65898), (471, 43932), (523, 39564), (628, 32949), (942, 21966), (1046, 19782), (1099, 18828), (1413, 14644), (1569, 13188), (1884, 10983), (2092, 9891), (2198, 9414), (2826, 7322), (3138, 6594), (3297, 6276), (3661, 5652), (4396, 4707)]