28108125

素因数分解:

$3^2\times 5^4\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:308

約数の個数: 60

約数和(自身を含む): 53607840

約数和(自身を除く): 25499715

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 125, 171, 225, 263, 285, 375, 475, 625, 789, 855, 1125, 1315, 1425, 1875, 2367, 2375, 3945, 4275, 4997, 5625, 6575, 7125, 11835, 11875, 14991, 19725, 21375, 24985, 32875, 35625, 44973, 59175, 74955, 98625, 106875, 124925, 164375, 224865, 295875, 374775, 493125, 624625, 1124325, 1479375, 1873875, 3123125, 5621625, 9369375, 28108125]

約数ペア:

[(1, 28108125), (3, 9369375), (5, 5621625), (9, 3123125), (15, 1873875), (19, 1479375), (25, 1124325), (45, 624625), (57, 493125), (75, 374775), (95, 295875), (125, 224865), (171, 164375), (225, 124925), (263, 106875), (285, 98625), (375, 74955), (475, 59175), (625, 44973), (789, 35625), (855, 32875), (1125, 24985), (1315, 21375), (1425, 19725), (1875, 14991), (2367, 11875), (2375, 11835), (3945, 7125), (4275, 6575), (4997, 5625)]