128807680

素因数分解:

$2^8\times 5^1\times {\mathrm{103}}^1\times {\mathrm{977}}^1$

素因数の和:1101

約数の個数: 72

約数和(自身を含む): 311848992

約数和(自身を除く): 183041312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 128, 160, 206, 256, 320, 412, 515, 640, 824, 977, 1030, 1280, 1648, 1954, 2060, 3296, 3908, 4120, 4885, 6592, 7816, 8240, 9770, 13184, 15632, 16480, 19540, 26368, 31264, 32960, 39080, 62528, 65920, 78160, 100631, 125056, 131840, 156320, 201262, 250112, 312640, 402524, 503155, 625280, 805048, 1006310, 1250560, 1610096, 2012620, 3220192, 4025240, 6440384, 8050480, 12880768, 16100960, 25761536, 32201920, 64403840, 128807680]

約数ペア:

[(1, 128807680), (2, 64403840), (4, 32201920), (5, 25761536), (8, 16100960), (10, 12880768), (16, 8050480), (20, 6440384), (32, 4025240), (40, 3220192), (64, 2012620), (80, 1610096), (103, 1250560), (128, 1006310), (160, 805048), (206, 625280), (256, 503155), (320, 402524), (412, 312640), (515, 250112), (640, 201262), (824, 156320), (977, 131840), (1030, 125056), (1280, 100631), (1648, 78160), (1954, 65920), (2060, 62528), (3296, 39080), (3908, 32960), (4120, 31264), (4885, 26368), (6592, 19540), (7816, 16480), (8240, 15632), (9770, 13184)]