20911975

素因数分解:

$5^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:464

約数の個数: 36

約数和(自身を含む): 30943704

約数和(自身を除く): 10031729

約数列:

[1, 5, 7, 25, 35, 43, 49, 175, 215, 245, 301, 397, 1075, 1225, 1505, 1985, 2107, 2779, 7525, 9925, 10535, 13895, 17071, 19453, 52675, 69475, 85355, 97265, 119497, 426775, 486325, 597485, 836479, 2987425, 4182395, 20911975]

約数ペア:

[(1, 20911975), (5, 4182395), (7, 2987425), (25, 836479), (35, 597485), (43, 486325), (49, 426775), (175, 119497), (215, 97265), (245, 85355), (301, 69475), (397, 52675), (1075, 19453), (1225, 17071), (1505, 13895), (1985, 10535), (2107, 9925), (2779, 7525)]