21989975

素因数分解:

$5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{619}}^1$

素因数の和:672

約数の個数: 36

約数和(自身を含む): 32866200

約数和(自身を除く): 10876225

約数列:

[1, 5, 7, 25, 29, 35, 49, 145, 175, 203, 245, 619, 725, 1015, 1225, 1421, 3095, 4333, 5075, 7105, 15475, 17951, 21665, 30331, 35525, 89755, 108325, 125657, 151655, 448775, 628285, 758275, 879599, 3141425, 4397995, 21989975]

約数ペア:

[(1, 21989975), (5, 4397995), (7, 3141425), (25, 879599), (29, 758275), (35, 628285), (49, 448775), (145, 151655), (175, 125657), (203, 108325), (245, 89755), (619, 35525), (725, 30331), (1015, 21665), (1225, 17951), (1421, 15475), (3095, 7105), (4333, 5075)]