21000658175

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{431}}^1\times {\mathrm{6791}}^1$

素因数の和:7280

約数の個数: 48

約数和(自身を含む): 30562043904

約数和(自身を除く): 9561385729

約数列:

[1, 5, 7, 25, 35, 41, 175, 205, 287, 431, 1025, 1435, 2155, 3017, 6791, 7175, 10775, 15085, 17671, 33955, 47537, 75425, 88355, 123697, 169775, 237685, 278431, 441775, 618485, 1188425, 1392155, 1949017, 2926921, 3092425, 6960775, 9745085, 14634605, 20488447, 48725425, 73173025, 102442235, 120003761, 512211175, 600018805, 840026327, 3000094025, 4200131635, 21000658175]

約数ペア:

[(1, 21000658175), (5, 4200131635), (7, 3000094025), (25, 840026327), (35, 600018805), (41, 512211175), (175, 120003761), (205, 102442235), (287, 73173025), (431, 48725425), (1025, 20488447), (1435, 14634605), (2155, 9745085), (3017, 6960775), (6791, 3092425), (7175, 2926921), (10775, 1949017), (15085, 1392155), (17671, 1188425), (33955, 618485), (47537, 441775), (75425, 278431), (88355, 237685), (123697, 169775)]