21497525

素因数分解:

$5^2\times 7^3\times {\mathrm{23}}^1\times {\mathrm{109}}^1$

素因数の和:163

約数の個数: 48

約数和(自身を含む): 32736000

約数和(自身を除く): 11238475

約数列:

[1, 5, 7, 23, 25, 35, 49, 109, 115, 161, 175, 245, 343, 545, 575, 763, 805, 1127, 1225, 1715, 2507, 2725, 3815, 4025, 5341, 5635, 7889, 8575, 12535, 17549, 19075, 26705, 28175, 37387, 39445, 62675, 87745, 122843, 133525, 186935, 197225, 438725, 614215, 859901, 934675, 3071075, 4299505, 21497525]

約数ペア:

[(1, 21497525), (5, 4299505), (7, 3071075), (23, 934675), (25, 859901), (35, 614215), (49, 438725), (109, 197225), (115, 186935), (161, 133525), (175, 122843), (245, 87745), (343, 62675), (545, 39445), (575, 37387), (763, 28175), (805, 26705), (1127, 19075), (1225, 17549), (1715, 12535), (2507, 8575), (2725, 7889), (3815, 5635), (4025, 5341)]