21105808

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69427}}^1$

素因数の和:69454

約数の個数: 20

約数和(自身を含む): 43045360

約数和(自身を除く): 21939552

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69427, 138854, 277708, 555416, 1110832, 1319113, 2638226, 5276452, 10552904, 21105808]

約数ペア:

[(1, 21105808), (2, 10552904), (4, 5276452), (8, 2638226), (16, 1319113), (19, 1110832), (38, 555416), (76, 277708), (152, 138854), (304, 69427)]