777777280

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1249}}^1$

素因数の和:1414

約数の個数: 128

約数和(自身を含む): 2142000000

約数和(自身を除く): 1364222720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 139, 140, 160, 224, 278, 280, 320, 448, 556, 560, 640, 695, 896, 973, 1112, 1120, 1249, 1390, 1946, 2224, 2240, 2498, 2780, 3892, 4448, 4480, 4865, 4996, 5560, 6245, 7784, 8743, 8896, 9730, 9992, 11120, 12490, 15568, 17486, 17792, 19460, 19984, 22240, 24980, 31136, 34972, 38920, 39968, 43715, 44480, 49960, 62272, 69944, 77840, 79936, 87430, 88960, 99920, 124544, 139888, 155680, 159872, 173611, 174860, 199840, 279776, 311360, 347222, 349720, 399680, 559552, 622720, 694444, 699440, 799360, 868055, 1119104, 1215277, 1388888, 1398880, 1736110, 2430554, 2777776, 2797760, 3472220, 4861108, 5555552, 5595520, 6076385, 6944440, 9722216, 11111104, 12152770, 13888880, 19444432, 22222208, 24305540, 27777760, 38888864, 48611080, 55555520, 77777728, 97222160, 111111040, 155555456, 194444320, 388888640, 777777280]

約数ペア:

[(1, 777777280), (2, 388888640), (4, 194444320), (5, 155555456), (7, 111111040), (8, 97222160), (10, 77777728), (14, 55555520), (16, 48611080), (20, 38888864), (28, 27777760), (32, 24305540), (35, 22222208), (40, 19444432), (56, 13888880), (64, 12152770), (70, 11111104), (80, 9722216), (112, 6944440), (128, 6076385), (139, 5595520), (140, 5555552), (160, 4861108), (224, 3472220), (278, 2797760), (280, 2777776), (320, 2430554), (448, 1736110), (556, 1398880), (560, 1388888), (640, 1215277), (695, 1119104), (896, 868055), (973, 799360), (1112, 699440), (1120, 694444), (1249, 622720), (1390, 559552), (1946, 399680), (2224, 349720), (2240, 347222), (2498, 311360), (2780, 279776), (3892, 199840), (4448, 174860), (4480, 173611), (4865, 159872), (4996, 155680), (5560, 139888), (6245, 124544), (7784, 99920), (8743, 88960), (8896, 87430), (9730, 79936), (9992, 77840), (11120, 69944), (12490, 62272), (15568, 49960), (17486, 44480), (17792, 43715), (19460, 39968), (19984, 38920), (22240, 34972), (24980, 31136)]