21972075

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{907}}^1$

素因数の和:956

約数の個数: 48

約数和(自身を含む): 40533120

約数和(自身を除く): 18561045

約数列:

[1, 3, 5, 15, 17, 19, 25, 51, 57, 75, 85, 95, 255, 285, 323, 425, 475, 907, 969, 1275, 1425, 1615, 2721, 4535, 4845, 8075, 13605, 15419, 17233, 22675, 24225, 46257, 51699, 68025, 77095, 86165, 231285, 258495, 292961, 385475, 430825, 878883, 1156425, 1292475, 1464805, 4394415, 7324025, 21972075]

約数ペア:

[(1, 21972075), (3, 7324025), (5, 4394415), (15, 1464805), (17, 1292475), (19, 1156425), (25, 878883), (51, 430825), (57, 385475), (75, 292961), (85, 258495), (95, 231285), (255, 86165), (285, 77095), (323, 68025), (425, 51699), (475, 46257), (907, 24225), (969, 22675), (1275, 17233), (1425, 15419), (1615, 13605), (2721, 8075), (4535, 4845)]