18711880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^2$

素因数の和:131

約数の個数: 96

約数和(自身を含む): 49066560

約数和(自身を除く): 30354680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 43, 44, 46, 55, 86, 88, 92, 110, 115, 172, 184, 215, 220, 230, 253, 344, 430, 440, 460, 473, 506, 860, 920, 946, 989, 1012, 1265, 1720, 1849, 1892, 1978, 2024, 2365, 2530, 3698, 3784, 3956, 4730, 4945, 5060, 7396, 7912, 9245, 9460, 9890, 10120, 10879, 14792, 18490, 18920, 19780, 20339, 21758, 36980, 39560, 40678, 42527, 43516, 54395, 73960, 81356, 85054, 87032, 101695, 108790, 162712, 170108, 203390, 212635, 217580, 340216, 406780, 425270, 435160, 467797, 813560, 850540, 935594, 1701080, 1871188, 2338985, 3742376, 4677970, 9355940, 18711880]

約数ペア:

[(1, 18711880), (2, 9355940), (4, 4677970), (5, 3742376), (8, 2338985), (10, 1871188), (11, 1701080), (20, 935594), (22, 850540), (23, 813560), (40, 467797), (43, 435160), (44, 425270), (46, 406780), (55, 340216), (86, 217580), (88, 212635), (92, 203390), (110, 170108), (115, 162712), (172, 108790), (184, 101695), (215, 87032), (220, 85054), (230, 81356), (253, 73960), (344, 54395), (430, 43516), (440, 42527), (460, 40678), (473, 39560), (506, 36980), (860, 21758), (920, 20339), (946, 19780), (989, 18920), (1012, 18490), (1265, 14792), (1720, 10879), (1849, 10120), (1892, 9890), (1978, 9460), (2024, 9245), (2365, 7912), (2530, 7396), (3698, 5060), (3784, 4945), (3956, 4730)]