21787854

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{463}}^1$

素因数の和:533

約数の個数: 64

約数和(自身を含む): 51314688

約数和(自身を除く): 29526834

約数列:

[1, 2, 3, 6, 11, 22, 23, 31, 33, 46, 62, 66, 69, 93, 138, 186, 253, 341, 463, 506, 682, 713, 759, 926, 1023, 1389, 1426, 1518, 2046, 2139, 2778, 4278, 5093, 7843, 10186, 10649, 14353, 15279, 15686, 21298, 23529, 28706, 30558, 31947, 43059, 47058, 63894, 86118, 117139, 157883, 234278, 315766, 330119, 351417, 473649, 660238, 702834, 947298, 990357, 1980714, 3631309, 7262618, 10893927, 21787854]

約数ペア:

[(1, 21787854), (2, 10893927), (3, 7262618), (6, 3631309), (11, 1980714), (22, 990357), (23, 947298), (31, 702834), (33, 660238), (46, 473649), (62, 351417), (66, 330119), (69, 315766), (93, 234278), (138, 157883), (186, 117139), (253, 86118), (341, 63894), (463, 47058), (506, 43059), (682, 31947), (713, 30558), (759, 28706), (926, 23529), (1023, 21298), (1389, 15686), (1426, 15279), (1518, 14353), (2046, 10649), (2139, 10186), (2778, 7843), (4278, 5093)]