81431264

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{1999}}^1$

素因数の和:2095

約数の個数: 48

約数和(自身を含む): 171360000

約数和(自身を除く): 89928736

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 67, 76, 134, 152, 268, 304, 536, 608, 1072, 1273, 1999, 2144, 2546, 3998, 5092, 7996, 10184, 15992, 20368, 31984, 37981, 40736, 63968, 75962, 133933, 151924, 267866, 303848, 535732, 607696, 1071464, 1215392, 2142928, 2544727, 4285856, 5089454, 10178908, 20357816, 40715632, 81431264]

約数ペア:

[(1, 81431264), (2, 40715632), (4, 20357816), (8, 10178908), (16, 5089454), (19, 4285856), (32, 2544727), (38, 2142928), (67, 1215392), (76, 1071464), (134, 607696), (152, 535732), (268, 303848), (304, 267866), (536, 151924), (608, 133933), (1072, 75962), (1273, 63968), (1999, 40736), (2144, 37981), (2546, 31984), (3998, 20368), (5092, 15992), (7996, 10184)]