21241075

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:144

約数の個数: 48

約数和(自身を含む): 30373056

約数和(自身を除く): 9131981

約数列:

[1, 5, 17, 23, 25, 41, 53, 85, 115, 205, 265, 391, 425, 575, 697, 901, 943, 1025, 1219, 1325, 1955, 2173, 3485, 4505, 4715, 6095, 9775, 10865, 16031, 17425, 20723, 22525, 23575, 30475, 36941, 49979, 54325, 80155, 103615, 184705, 249895, 400775, 518075, 849643, 923525, 1249475, 4248215, 21241075]

約数ペア:

[(1, 21241075), (5, 4248215), (17, 1249475), (23, 923525), (25, 849643), (41, 518075), (53, 400775), (85, 249895), (115, 184705), (205, 103615), (265, 80155), (391, 54325), (425, 49979), (575, 36941), (697, 30475), (901, 23575), (943, 22525), (1025, 20723), (1219, 17425), (1325, 16031), (1955, 10865), (2173, 9775), (3485, 6095), (4505, 4715)]