21243075

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{941}}^1$

素因数の和:1004

約数の個数: 48

約数和(自身を含む): 41116416

約数和(自身を除く): 19873341

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 43, 75, 105, 129, 175, 215, 301, 525, 645, 903, 941, 1075, 1505, 2823, 3225, 4515, 4705, 6587, 7525, 14115, 19761, 22575, 23525, 32935, 40463, 70575, 98805, 121389, 164675, 202315, 283241, 494025, 606945, 849723, 1011575, 1416205, 3034725, 4248615, 7081025, 21243075]

約数ペア:

[(1, 21243075), (3, 7081025), (5, 4248615), (7, 3034725), (15, 1416205), (21, 1011575), (25, 849723), (35, 606945), (43, 494025), (75, 283241), (105, 202315), (129, 164675), (175, 121389), (215, 98805), (301, 70575), (525, 40463), (645, 32935), (903, 23525), (941, 22575), (1075, 19761), (1505, 14115), (2823, 7525), (3225, 6587), (4515, 4705)]