21000455525

素因数分解:

$5^2\times 7^2\times {\mathrm{349}}^1\times {\mathrm{49121}}^1$

素因数の和:49494

約数の個数: 36

約数和(自身を含む): 30379500900

約数和(自身を除く): 9379045375

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 349, 1225, 1745, 2443, 8725, 12215, 17101, 49121, 61075, 85505, 245605, 343847, 427525, 1228025, 1719235, 2406929, 8596175, 12034645, 17143229, 60173225, 85716145, 120002603, 428580725, 600013015, 840018221, 3000065075, 4200091105, 21000455525]

約数ペア:

[(1, 21000455525), (5, 4200091105), (7, 3000065075), (25, 840018221), (35, 600013015), (49, 428580725), (175, 120002603), (245, 85716145), (349, 60173225), (1225, 17143229), (1745, 12034645), (2443, 8596175), (8725, 2406929), (12215, 1719235), (17101, 1228025), (49121, 427525), (61075, 343847), (85505, 245605)]