81032720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{599}}^1$

素因数の和:720

約数の個数: 80

約数和(自身を含む): 200880000

約数和(自身を除く): 119847280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 89, 95, 152, 178, 190, 304, 356, 380, 445, 599, 712, 760, 890, 1198, 1424, 1520, 1691, 1780, 2396, 2995, 3382, 3560, 4792, 5990, 6764, 7120, 8455, 9584, 11381, 11980, 13528, 16910, 22762, 23960, 27056, 33820, 45524, 47920, 53311, 56905, 67640, 91048, 106622, 113810, 135280, 182096, 213244, 227620, 266555, 426488, 455240, 533110, 852976, 910480, 1012909, 1066220, 2025818, 2132440, 4051636, 4264880, 5064545, 8103272, 10129090, 16206544, 20258180, 40516360, 81032720]

約数ペア:

[(1, 81032720), (2, 40516360), (4, 20258180), (5, 16206544), (8, 10129090), (10, 8103272), (16, 5064545), (19, 4264880), (20, 4051636), (38, 2132440), (40, 2025818), (76, 1066220), (80, 1012909), (89, 910480), (95, 852976), (152, 533110), (178, 455240), (190, 426488), (304, 266555), (356, 227620), (380, 213244), (445, 182096), (599, 135280), (712, 113810), (760, 106622), (890, 91048), (1198, 67640), (1424, 56905), (1520, 53311), (1691, 47920), (1780, 45524), (2396, 33820), (2995, 27056), (3382, 23960), (3560, 22762), (4792, 16910), (5990, 13528), (6764, 11980), (7120, 11381), (8455, 9584)]