81564875

素因数分解:

$5^3\times 7^1\times {\mathrm{31}}^2\times {\mathrm{97}}^1$

素因数の和:181

約数の個数: 48

約数和(自身を含む): 121447872

約数和(自身を除く): 39882997

約数列:

[1, 5, 7, 25, 31, 35, 97, 125, 155, 175, 217, 485, 679, 775, 875, 961, 1085, 2425, 3007, 3395, 3875, 4805, 5425, 6727, 12125, 15035, 16975, 21049, 24025, 27125, 33635, 75175, 84875, 93217, 105245, 120125, 168175, 375875, 466085, 526225, 652519, 840875, 2330425, 2631125, 3262595, 11652125, 16312975, 81564875]

約数ペア:

[(1, 81564875), (5, 16312975), (7, 11652125), (25, 3262595), (31, 2631125), (35, 2330425), (97, 840875), (125, 652519), (155, 526225), (175, 466085), (217, 375875), (485, 168175), (679, 120125), (775, 105245), (875, 93217), (961, 84875), (1085, 75175), (2425, 33635), (3007, 27125), (3395, 24025), (3875, 21049), (4805, 16975), (5425, 15035), (6727, 12125)]