78888880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{787}}^1$

素因数の和:986

約数の個数: 80

約数和(自身を含む): 211057920

約数和(自身を除く): 132169040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 179, 280, 358, 560, 716, 787, 895, 1253, 1432, 1574, 1790, 2506, 2864, 3148, 3580, 3935, 5012, 5509, 6265, 6296, 7160, 7870, 10024, 11018, 12530, 12592, 14320, 15740, 20048, 22036, 25060, 27545, 31480, 44072, 50120, 55090, 62960, 88144, 100240, 110180, 140873, 220360, 281746, 440720, 563492, 704365, 986111, 1126984, 1408730, 1972222, 2253968, 2817460, 3944444, 4930555, 5634920, 7888888, 9861110, 11269840, 15777776, 19722220, 39444440, 78888880]

約数ペア:

[(1, 78888880), (2, 39444440), (4, 19722220), (5, 15777776), (7, 11269840), (8, 9861110), (10, 7888888), (14, 5634920), (16, 4930555), (20, 3944444), (28, 2817460), (35, 2253968), (40, 1972222), (56, 1408730), (70, 1126984), (80, 986111), (112, 704365), (140, 563492), (179, 440720), (280, 281746), (358, 220360), (560, 140873), (716, 110180), (787, 100240), (895, 88144), (1253, 62960), (1432, 55090), (1574, 50120), (1790, 44072), (2506, 31480), (2864, 27545), (3148, 25060), (3580, 22036), (3935, 20048), (5012, 15740), (5509, 14320), (6265, 12592), (6296, 12530), (7160, 11018), (7870, 10024)]