21000620165

素因数分解:

$5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1085023}}^1$

素因数の和:1085121

約数の個数: 24

約数和(自身を含む): 29686256640

約数和(自身を除く): 8685636475

約数列:

[1, 5, 7, 35, 49, 79, 245, 395, 553, 2765, 3871, 19355, 1085023, 5425115, 7595161, 37975805, 53166127, 85716817, 265830635, 428584085, 600017719, 3000088595, 4200124033, 21000620165]

約数ペア:

[(1, 21000620165), (5, 4200124033), (7, 3000088595), (35, 600017719), (49, 428584085), (79, 265830635), (245, 85716817), (395, 53166127), (553, 37975805), (2765, 7595161), (3871, 5425115), (19355, 1085023)]