19986642

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{401}}^1$

素因数の和:496

約数の個数: 64

約数和(自身を含む): 48625920

約数和(自身を除く): 28639278

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 71, 78, 117, 142, 213, 234, 351, 401, 426, 639, 702, 802, 923, 1203, 1278, 1846, 1917, 2406, 2769, 3609, 3834, 5213, 5538, 7218, 8307, 10426, 10827, 15639, 16614, 21654, 24921, 28471, 31278, 46917, 49842, 56942, 85413, 93834, 140751, 170826, 256239, 281502, 370123, 512478, 740246, 768717, 1110369, 1537434, 2220738, 3331107, 6662214, 9993321, 19986642]

約数ペア:

[(1, 19986642), (2, 9993321), (3, 6662214), (6, 3331107), (9, 2220738), (13, 1537434), (18, 1110369), (26, 768717), (27, 740246), (39, 512478), (54, 370123), (71, 281502), (78, 256239), (117, 170826), (142, 140751), (213, 93834), (234, 85413), (351, 56942), (401, 49842), (426, 46917), (639, 31278), (702, 28471), (802, 24921), (923, 21654), (1203, 16614), (1278, 15639), (1846, 10827), (1917, 10426), (2406, 8307), (2769, 7218), (3609, 5538), (3834, 5213)]