21021875

素因数分解:

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

素因数の和:94

約数の個数: 36

約数和(自身を含む): 31029264

約数和(自身を除く): 10007389

約数列:

[1, 5, 7, 25, 31, 35, 125, 155, 175, 217, 625, 775, 875, 961, 1085, 3125, 3875, 4375, 4805, 5425, 6727, 19375, 21875, 24025, 27125, 33635, 96875, 120125, 135625, 168175, 600625, 678125, 840875, 3003125, 4204375, 21021875]

約数ペア:

[(1, 21021875), (5, 4204375), (7, 3003125), (25, 840875), (31, 678125), (35, 600625), (125, 168175), (155, 135625), (175, 120125), (217, 96875), (625, 33635), (775, 27125), (875, 24025), (961, 21875), (1085, 19375), (3125, 6727), (3875, 5425), (4375, 4805)]