20120704256

素因数分解:

$2^8\times {\mathrm{31}}^1\times {\mathrm{997}}^1\times {\mathrm{2543}}^1$

素因数の和:3587

約数の個数: 72

約数和(自身を含む): 41516289024

約数和(自身を除く): 21395584768

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 992, 997, 1984, 1994, 2543, 3968, 3988, 5086, 7936, 7976, 10172, 15952, 20344, 30907, 31904, 40688, 61814, 63808, 78833, 81376, 123628, 127616, 157666, 162752, 247256, 255232, 315332, 325504, 494512, 630664, 651008, 989024, 1261328, 1978048, 2522656, 2535371, 3956096, 5045312, 5070742, 7912192, 10090624, 10141484, 20181248, 20282968, 40565936, 78596501, 81131872, 157193002, 162263744, 314386004, 324527488, 628772008, 649054976, 1257544016, 2515088032, 5030176064, 10060352128, 20120704256]

約数ペア:

[(1, 20120704256), (2, 10060352128), (4, 5030176064), (8, 2515088032), (16, 1257544016), (31, 649054976), (32, 628772008), (62, 324527488), (64, 314386004), (124, 162263744), (128, 157193002), (248, 81131872), (256, 78596501), (496, 40565936), (992, 20282968), (997, 20181248), (1984, 10141484), (1994, 10090624), (2543, 7912192), (3968, 5070742), (3988, 5045312), (5086, 3956096), (7936, 2535371), (7976, 2522656), (10172, 1978048), (15952, 1261328), (20344, 989024), (30907, 651008), (31904, 630664), (40688, 494512), (61814, 325504), (63808, 315332), (78833, 255232), (81376, 247256), (123628, 162752), (127616, 157666)]