128879120

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{787}}^1$

素因数の和:912

約数の個数: 80

約数和(自身を含む): 316586880

約数和(自身を除く): 187707760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 89, 92, 115, 178, 184, 230, 356, 368, 445, 460, 712, 787, 890, 920, 1424, 1574, 1780, 1840, 2047, 3148, 3560, 3935, 4094, 6296, 7120, 7870, 8188, 10235, 12592, 15740, 16376, 18101, 20470, 31480, 32752, 36202, 40940, 62960, 70043, 72404, 81880, 90505, 140086, 144808, 163760, 181010, 280172, 289616, 350215, 362020, 560344, 700430, 724040, 1120688, 1400860, 1448080, 1610989, 2801720, 3221978, 5603440, 6443956, 8054945, 12887912, 16109890, 25775824, 32219780, 64439560, 128879120]

約数ペア:

[(1, 128879120), (2, 64439560), (4, 32219780), (5, 25775824), (8, 16109890), (10, 12887912), (16, 8054945), (20, 6443956), (23, 5603440), (40, 3221978), (46, 2801720), (80, 1610989), (89, 1448080), (92, 1400860), (115, 1120688), (178, 724040), (184, 700430), (230, 560344), (356, 362020), (368, 350215), (445, 289616), (460, 280172), (712, 181010), (787, 163760), (890, 144808), (920, 140086), (1424, 90505), (1574, 81880), (1780, 72404), (1840, 70043), (2047, 62960), (3148, 40940), (3560, 36202), (3935, 32752), (4094, 31480), (6296, 20470), (7120, 18101), (7870, 16376), (8188, 15740), (10235, 12592)]