20656818

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{12611}}^1$

素因数の和:12639

約数の個数: 48

約数和(自身を含む): 55089216

約数和(自身を除く): 34432398

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 39, 42, 63, 78, 91, 117, 126, 182, 234, 273, 546, 819, 1638, 12611, 25222, 37833, 75666, 88277, 113499, 163943, 176554, 226998, 264831, 327886, 491829, 529662, 794493, 983658, 1147601, 1475487, 1588986, 2295202, 2950974, 3442803, 6885606, 10328409, 20656818]

約数ペア:

[(1, 20656818), (2, 10328409), (3, 6885606), (6, 3442803), (7, 2950974), (9, 2295202), (13, 1588986), (14, 1475487), (18, 1147601), (21, 983658), (26, 794493), (39, 529662), (42, 491829), (63, 327886), (78, 264831), (91, 226998), (117, 176554), (126, 163943), (182, 113499), (234, 88277), (273, 75666), (546, 37833), (819, 25222), (1638, 12611)]