20787025

素因数分解:

$5^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:334

約数の個数: 36

約数和(自身を含む): 30533760

約数和(自身を除く): 9746735

約数列:

[1, 5, 7, 25, 35, 49, 71, 175, 239, 245, 355, 497, 1195, 1225, 1673, 1775, 2485, 3479, 5975, 8365, 11711, 12425, 16969, 17395, 41825, 58555, 84845, 86975, 118783, 292775, 424225, 593915, 831481, 2969575, 4157405, 20787025]

約数ペア:

[(1, 20787025), (5, 4157405), (7, 2969575), (25, 831481), (35, 593915), (49, 424225), (71, 292775), (175, 118783), (239, 86975), (245, 84845), (355, 58555), (497, 41825), (1195, 17395), (1225, 16969), (1673, 12425), (1775, 11711), (2485, 8365), (3479, 5975)]