20808788

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{5197}}^1$

素因数の和:5232

約数の個数: 48

約数和(自身を含む): 48902784

約数和(自身を除く): 28093996

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 182, 286, 308, 364, 572, 1001, 2002, 4004, 5197, 10394, 20788, 36379, 57167, 67561, 72758, 114334, 135122, 145516, 228668, 270244, 400169, 472927, 743171, 800338, 945854, 1486342, 1600676, 1891708, 2972684, 5202197, 10404394, 20808788]

約数ペア:

[(1, 20808788), (2, 10404394), (4, 5202197), (7, 2972684), (11, 1891708), (13, 1600676), (14, 1486342), (22, 945854), (26, 800338), (28, 743171), (44, 472927), (52, 400169), (77, 270244), (91, 228668), (143, 145516), (154, 135122), (182, 114334), (286, 72758), (308, 67561), (364, 57167), (572, 36379), (1001, 20788), (2002, 10394), (4004, 5197)]