28266875

素因数分解:

$5^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:118

約数の個数: 60

約数和(自身を含む): 44873136

約数和(自身を除く): 16606261

約数列:

[1, 5, 7, 13, 25, 35, 49, 65, 71, 91, 125, 175, 245, 325, 355, 455, 497, 625, 637, 875, 923, 1225, 1625, 1775, 2275, 2485, 3185, 3479, 4375, 4615, 6125, 6461, 8125, 8875, 11375, 12425, 15925, 17395, 23075, 30625, 32305, 44375, 45227, 56875, 62125, 79625, 86975, 115375, 161525, 226135, 310625, 398125, 434875, 576875, 807625, 1130675, 2174375, 4038125, 5653375, 28266875]

約数ペア:

[(1, 28266875), (5, 5653375), (7, 4038125), (13, 2174375), (25, 1130675), (35, 807625), (49, 576875), (65, 434875), (71, 398125), (91, 310625), (125, 226135), (175, 161525), (245, 115375), (325, 86975), (355, 79625), (455, 62125), (497, 56875), (625, 45227), (637, 44375), (875, 32305), (923, 30625), (1225, 23075), (1625, 17395), (1775, 15925), (2275, 12425), (2485, 11375), (3185, 8875), (3479, 8125), (4375, 6461), (4615, 6125)]