19917275

素因数分解:

$5^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{229}}^1$

素因数の和:324

約数の個数: 36

約数和(自身を含む): 29261520

約数和(自身を除く): 9344245

約数列:

[1, 5, 7, 25, 35, 49, 71, 175, 229, 245, 355, 497, 1145, 1225, 1603, 1775, 2485, 3479, 5725, 8015, 11221, 12425, 16259, 17395, 40075, 56105, 81295, 86975, 113813, 280525, 406475, 569065, 796691, 2845325, 3983455, 19917275]

約数ペア:

[(1, 19917275), (5, 3983455), (7, 2845325), (25, 796691), (35, 569065), (49, 406475), (71, 280525), (175, 113813), (229, 86975), (245, 81295), (355, 56105), (497, 40075), (1145, 17395), (1225, 16259), (1603, 12425), (1775, 11221), (2485, 8015), (3479, 5725)]