81880880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{523}}^1$

素因数の和:658

約数の個数: 80

約数和(自身を含む): 202725120

約数和(自身を除く): 120844240

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 103, 152, 190, 206, 304, 380, 412, 515, 523, 760, 824, 1030, 1046, 1520, 1648, 1957, 2060, 2092, 2615, 3914, 4120, 4184, 5230, 7828, 8240, 8368, 9785, 9937, 10460, 15656, 19570, 19874, 20920, 31312, 39140, 39748, 41840, 49685, 53869, 78280, 79496, 99370, 107738, 156560, 158992, 198740, 215476, 269345, 397480, 430952, 538690, 794960, 861904, 1023511, 1077380, 2047022, 2154760, 4094044, 4309520, 5117555, 8188088, 10235110, 16376176, 20470220, 40940440, 81880880]

約数ペア:

[(1, 81880880), (2, 40940440), (4, 20470220), (5, 16376176), (8, 10235110), (10, 8188088), (16, 5117555), (19, 4309520), (20, 4094044), (38, 2154760), (40, 2047022), (76, 1077380), (80, 1023511), (95, 861904), (103, 794960), (152, 538690), (190, 430952), (206, 397480), (304, 269345), (380, 215476), (412, 198740), (515, 158992), (523, 156560), (760, 107738), (824, 99370), (1030, 79496), (1046, 78280), (1520, 53869), (1648, 49685), (1957, 41840), (2060, 39748), (2092, 39140), (2615, 31312), (3914, 20920), (4120, 19874), (4184, 19570), (5230, 15656), (7828, 10460), (8240, 9937), (8368, 9785)]