20509538

素因数分解:

$2^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:247

約数の個数: 48

約数和(自身を含む): 38041344

約数和(自身を除く): 17531806

約数列:

[1, 2, 7, 14, 31, 43, 49, 62, 86, 98, 157, 217, 301, 314, 434, 602, 1099, 1333, 1519, 2107, 2198, 2666, 3038, 4214, 4867, 6751, 7693, 9331, 9734, 13502, 15386, 18662, 34069, 47257, 65317, 68138, 94514, 130634, 209281, 238483, 330799, 418562, 476966, 661598, 1464967, 2929934, 10254769, 20509538]

約数ペア:

[(1, 20509538), (2, 10254769), (7, 2929934), (14, 1464967), (31, 661598), (43, 476966), (49, 418562), (62, 330799), (86, 238483), (98, 209281), (157, 130634), (217, 94514), (301, 68138), (314, 65317), (434, 47257), (602, 34069), (1099, 18662), (1333, 15386), (1519, 13502), (2107, 9734), (2198, 9331), (2666, 7693), (3038, 6751), (4214, 4867)]