21378525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{947}}^1$

素因数の和:1010

約数の個数: 48

約数和(自身を含む): 41378304

約数和(自身を除く): 19999779

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 43, 75, 105, 129, 175, 215, 301, 525, 645, 903, 947, 1075, 1505, 2841, 3225, 4515, 4735, 6629, 7525, 14205, 19887, 22575, 23675, 33145, 40721, 71025, 99435, 122163, 165725, 203605, 285047, 497175, 610815, 855141, 1018025, 1425235, 3054075, 4275705, 7126175, 21378525]

約数ペア:

[(1, 21378525), (3, 7126175), (5, 4275705), (7, 3054075), (15, 1425235), (21, 1018025), (25, 855141), (35, 610815), (43, 497175), (75, 285047), (105, 203605), (129, 165725), (175, 122163), (215, 99435), (301, 71025), (525, 40721), (645, 33145), (903, 23675), (947, 22575), (1075, 19887), (1505, 14205), (2841, 7525), (3225, 6629), (4515, 4735)]